118 PROCEEDINGS OF THE ACADEMY OP 



31. Ichneumon gracilentua. 



Ichneumon gracilentus, Cress., Trans. Am. Ent. Soc, ii. p. 16, % '^ . 



Cordova. (Sumichrast, Xo. 125.) 



32. Ichneumon Ai-ista. 



Ichneumon Arista, Cress., Trans. Am. Ent. Soc, ii. p. 16, ' 9 . 



Orizaba; Cordova. (Suraiclirast, No. 118.) Varies in length 

 from 6 to 8 lines. 



33. Ichneumon maritus. 



Ichneumon maritus, Cress., Trans. Am. Ent. Soc, ii. p. 16, "J, J. 



Cordova. (Sumichrast, Nos. 9 and GO.) 



34. Ichneumon Tuxtla. 



Ichneumon Tuxtla, Cress., Trans. Am. Ent. Soc, ii. p. 17, 9. 



Cordova. 



35. Ichneumon solitarius, n. sp. 



% . Black; face, mouth, orbits broad on cheeks, broad annulus 

 on antennae, collar, tegulje, line beneath, scutellum, postscutelluni, 

 metathorax (except three black stripes, connected b}^ a slender 

 black cross-line above spines), sides of pleura and beneath, base 

 of first abdominal segment, lateral and apical margins of remain- 

 ing segments and base of second and third, claj'-white; legs 

 luteous ; spot on four posterior eoxje, all the femora above, four 

 anterior tibiixj exteriorh", posterior pair entirely and base of their 

 tarsi, black; wings hyaline, nervnres black. Head and thorax 

 robust, the former broad and sub-buccate, eyes large and promi- 

 nent; thorax gibbous; scutellum flat; metathoracic sjjines long 

 and acute; legs slender; abdomen long, slender, flat, especially 

 towards apex; gastrocoeli deep. Length 6 lines. 



Orizaba. 



36. Ichneumon prolixus, n. sp. 



%. Headj'ellow; vertex, except orbits, occiput and antenna?, 

 except narrow whitish annulus and scape beneath, black ; thorax 

 yellow ; prothorax, except margins, mcsothorax, except two short 

 discal lines, apex of scutellum, and the surrounding space, double 

 line beneath wings, and three connected si)ots on metathorax 

 above, black ; tegulae yellow ; wings dusky hyaline, nervures black; 

 legs yellow ; apical line on four anterior femora behind, and line 

 on posterior femora above and beneatli confluent at tip within, 

 black ; abdomen black above, yellow beneath ; apex of all the 



