Revision of the World species of Xeris Costa (Hymenoptera: Siricidae) – Goulet, Boudreault and Schiff

Vertex densely pitted and without or almost without smooth surfaces (Fig. B2.1).

Maximum distance between outer genal edges shorter than maximum distance between outer edges of eyes (in frontal view outer edges of gena intersected by outer edges of eyes) (Fig. B2.4).

Maximum eye height in lateral view 0.53–0.61 times maximum head height (measured from genal transverse ridge above mandible to top of head) (Fig. B2.6).

Ventral surface of propleuron with clearly impressed meshes of microsculpture between teeth; sculpticells scale-like, dull between pits and teeth (Fig. B2.9).

In female, apical section of sheath without longitudinal ridge between dorsal and ventral edges (Fig. B2.12, insert); sheath with basal section 0.5–0.6 times as long as apical section (Fig. B2.12).

[Additional characters. Lateral surface of pronotum with sharply reticulate pattern around one or more pits (Fig. B2.15); ovipositor with a pit on each annulus anterior to teeth annuli and each pit large and extending anteriorly toward preceding annulus as a shallow furrow (Fig. B2.16); sheath with junction of basal and apical sections aligned between annuli 8 and 9 of ovipositor. Note. All known hosts are Cupressaceae. Range. Western United States between Washington and California.]

Gena dorsal to mandible with broadly rounded and coarsely pitted transverse ridge (Fig. B2.17).

Distance between lateral ocellus and nearest eye edge about 1.0 (Fig. B2.19).

Propleuron in ventral view densely pitted (Distance between lateral ocellus and nearest eye edge about 1.0 (Fig. B2.21).

In female, femora black, tibiae and metatarsomere 1 light reddish brown in basal 0.1 (Fig. B2.23).

Gena below eye and genal ridge (including adjacent occiput) densely pitted (Fig. B2.31, black arrow).

Clypeus with setae 1.0–1.5 times as long as diameter of lateral ocellus (Fig. B2.33, red arrow) and vertex quite densely pitted between dorsal edge of eye and occiput outside postocellar area (Fig. B2.33, black arrow).

Fore wing with cell C darkly tinted (yellowish brown to dark brown) and with base of stigma on both sides of junction with vein 1r-rs black or somewhat paler (as in Fig. B2.39).

Vertex with pits denser (usually touching) and bigger (0.2–0.5 times diameter of lateral ocellus) between dorsal edge of eye and occiput outside postocellar area (Fig. B2.41) or pits as in “b” (Fig. B2.42) and fore wing cell C color as in “A”.

Vertex between dorsal edge of eye and occiput outside postocellar area with dense (usually touching) and big pits (0.2–0.5 times diameter of lateral ocellus) (Fig. B2.44).

Gena with pits between eye outer edge and genal ridge large (0.2–0.4 times diameter of lateral ocellus) (Fig. B2.46).

In female, procoxa black (Fig. B2.48) and flagellum black (as in Fig. B2.50) or partly to completely light reddish brown (Figs. B2.51 and B2.52), or procoxa light reddish brown (Fig. B2.53) and flagellum completely light reddish brown (Fig. B2.52).

In male, pronotum in dorsal view black or black with a yellowish-white anterolateral spot at most extending posteriorly but not reaching posterolateral corner and much narrower posteriorly (Figs. B2.57 and B2.58).

Abdomen reddish brown (Fig. B2.60), or black and matching state of following characters (Fig. B2.61).

[Range. North America.]

In female, coxae, trochanters and femora black (Fig. B2.71).

Gena narrow, its maximum length from eye to genal ridge 0.40–0.50 times as long as maximum eye length (Fig. B2.76).

Abdomen black (Fig. B2.78).

In female, flagellum light reddish brown in apical 0.3 (rarely completely light reddish brown) (Fig. B2.80).

In female, fore wing with darkly tinted central and apical bands (Fig. B2.82).

[Note. Males of X. indecisus and X. degrooti are indistinguishable. Only X. indecisus is recorded from southern British Columbia, Washington, northern Idaho, Montana, western Oregon, and California. In the central portion of the Rocky Mountain ranges both species are sympatric.]

Clypeus in lateral view with setae about 0.6–0.7 times as long as diameter of lateral ocellus (Fig. B2.84).

[Range. Morocco, Tizi-Ifri and Talasse N’Tane.]

In female, sheath with basal section more than 0.27 times length of apical section (if 0.25–0.27, use characters B and C) (Fig. B2.88).

In most females, tergum 10 with meshes of microsculpture lightly impressed on laterobasal angle in dorsal view (Fig. B2.90).

In most females, abdominal tergum 9 in lateral view with meshes of microsculpture clearly impressed with scale-like sculpticells on surface posterior to and above lateral furrow, thus surface slightly dull (Fig. B2.92).

[Range. Recorded from central Alberta to Nova Scotia and south (east of Prairie region) to Minnesota and Maine. This species and X. caudatus are sympatric in the central regions of Alberta and Saskatchewan. Note. Males cannot be recognized on morphological features, but can be distinguished by their barcodes.]

Pronotum in dorsal view with yellowish-white longitudinal band very smooth between large teeth (Fig. B2.94).

Pronotum in lateral view almost entirely without coarse pits (pit base slightly to clearly raised as a tooth or cone and not fused with nearby teeth) (Fig. B2.96).

In female, coxae light reddish brown (Fig. B2.98).

[Additional characters. In male, gena with yellowish-white spot large, almost always sharply outlined, and extending to genal ridge but not behind ridge on occiput (Fig. B2.100); hind leg with metafemur reddish brown to completely black, apex of metatarsomere 1 narrowly reddish brown, and in most males, with black central transverse band on metatarsomere 2 (Fig. B2.101). Range. Central Europe.]

Clypeus with setae 1.0–1.4 times as long as length of lateral ocellus (Fig. B2.102).

Metanotum posterior to cenchrus and on lateral 0.5 of metascutellum with fine, isolated pits (Fig. B2.104).

In female, trochanters black, pro- and mesofemur brown, metafemur mostly black, and tarsomeres 1 (in apical 0.5) and all of tarsomeres 2–5 black, tibiae and basal 0.5 of metatarsomere 1 light reddish brown (Fig. B2.106).

In female, tergum 10 in dorsal view with teeth along lateral margin in apical 0.3 very small but larger toward apex (Fig. B2.109).

In female, flagellum black (Fig. B2.114).

In male, tarsomeres 2–5 light reddish brown (metatarsomere 2 may have an indistinct dark central spot) (Fig. B2.118).

In male, metatarsomere 1 black, but broadly reddish brown at apical margin (Fig. B2.120).

[Additional characters. Tergum 10 with surface anterior to anus often light reddish brown (Fig. B2.124). Range. Transpalaearctic, mainly in cold temperate and boreal regions.]

Pronotum in lateral view with deep and coarse polygonal pits on about 0.9 of surface (Fig. B2.125).

In female, flagellum black in basal 0.5 (7 or 8 basal flagellomeres) and light reddish brown apically (Fig. B2.127).

In male, gena with yellowish-white spot large, sharply outlined, and extending to genal ridge and clearly behind ridge on occiput (spot comma-like) (Fig. B2.130).

In male, pro- and mesotarsomeres 1 light reddish brown (Fig. B2.132).

[Range. Laos, Huaphan.]

Pronotum medially in dorsal view with a wide shiny surface and with a deep impression near center (Fig. B2.134, insert).

In female, flagellum black in basal 0.7–0.75 (9–10 basal flagellomeres) and light reddish brown apically (Fig. B2.136).

In female, tergum 8 dull over surface (sculpticells scale-like at or near lateral edge) (as in Fig. B2.140).