MEXICAN IIYMENOPTERA. 17 



fulvous at base, their femora have a black line above. Length 6 — 61 

 lines. 



Three 9 . one % , specimens. (Sumichrast Coll. No. 9.) 



31. Ichneumon Tuxtla, n. sji. 



9 . — Differs from tenebncus as follows : there is a white spot on each 

 side of mesothorax, over the tegulae ; the metathorax, instead of having- 

 a broad black stripe on each side above, has a black spot on basal mid- 

 dle confluent with a broad transverse band of same color on the middle, 

 and a black central stripe down the posterior truncation ; the posterior 

 coxaj have two dusky spots or stripes behind, and the femora above 

 and base of tibiae are more or less dusky. Length 4 — 5 lines. 



Three $ specimens. Readily distinguished from any of the pre- 

 ceding species by the marking of the metathorax. 



32. Ichneumon subspinosus, n. sp. 



S . — Ornamentation very similar to that of tepanecus, No. 6, but 

 lemon-yellow instead of white; the antennae are long, slender and fili- 

 form, with the scape beneath and a narrow annulus about the middle, 

 yellow ; the two pale vitta; on mesothorax are longer, and the surface 

 closely and rather strongly punctured ; scutellum more prominent and 

 more black at base ; pleura entirely yellow except the sutures and a 

 deep emargination on the sides beneath the wings; lateral tubercles of 

 metathorax prominent and acute; legs luteous-yellow, femora above, four 

 anterior tibiae and tarsi outwai'dly, and tips of posterior tibiae, black or 

 dusky, posterior coxae marked as in tepanecus ; apical fascias of abdo- 

 men rather broader. Length 4-1 — Si lines. 



Four % specimens. (Sumichrast Coll. Nos. 89 and 90.) This may 

 prove to be the % of tepanecus. 



33. Ichneumon toltecus, n. sp. 



9 ■ — Ferruginous, face and orbits yellowish; antennae black, a white 

 annulus on the middle, base ferruginous; sutures at base of scutellum 

 and of metathorax, tips of posterior tibias, their tarsi entirely, some- 

 times the petiole of abdomen, and base of second, third and fourth, 

 segments above, black; the pleura beneath and venter sometimes yel- 

 lowish ; wings yellow-hyaline, a faint fuscous cloud placed obliquely 

 beneath stigma, nervures blackish, most of stigma luteous. Head nar- 

 rowed beneath, the cheeks flattened ; antennae long and slender ; thorax 

 and abdomen densely punctured; scutellum gibbous, very abrupt on 

 the sides which are carinated, tip abrupt; metathorax rounded above, 

 sloping gradually behind, lateral tubercle well-developed and acute. 

 ]jength 5 — G lines. 



TKANS. AMEU. ENT. SOC. ( 3 ) MAV, 1868. 



