NATURAL SCIENCES OF PHILADELPHIA. 119 



segments above broadly 3'ellow, dilated laterally on second and 

 following segments ; gastrocoeli yeliovv. Form elongate ; head 

 and thorax robust ; abdomen depressed ; head buecate ; scutellum 

 flat ; metathorax truncate behind, no lateral tubercles ; abdomen 

 densely and longitudinally^ sculptured; gastrocoeli deep and 

 transverse. Length 8 lines. 

 Cordova. 



37. Ichneumon Cholula. 



Ichneumon Cholula, Cress., Trans. Am. Ent. Soc, ii. p. 5, 5. 



Cordova. (Sumichrast, No. 85.) 



38. Ichneumon zaptlanus, n. sp. 



9 . Head j^ellow, middle of vertex and occiput black ; antennse 

 black, scape beneath and broad aunulus on flagellum, yellowish- 

 white ; prothorax and mesothorax black, margins of formei- and 

 two central longitudinal, entire lines on latter, tegulte, spot on 

 each side behind, apex of scutellum, and postscutellum, yellow ; 

 metathorax 3^ellow^, with a central sub-basal, an apical and two 

 lateral confluent, black spots; pleura 3'ellow, with small black 

 spot beneath wings ; wings fusco-hyaline, nervui'es black ; legs 

 3'ellow ; large spot on posterior coxce above, all the femora above 

 and apex within, and line on all the tibiffi behind, black ; abdomen 

 yellow, with a large, transverse black mark on each dorsal seg- 

 ment, occupying nearly the whole surface. Form robust ; head 

 buecate ; scutellum flat, apex abrupt ; metathorax rugose, without 

 tubercles or spines ; abdomen depressed, surface densely rugose, 

 the segments more or less deeply incised at base ; gastrocoeli deep 

 and transverse. Length 6^ lines. 



Orizaba. 



39. Ichneumon excuratus, n. sp. 



% . Yellow ; vertex and occiput, except orbits, spot on each 

 side of prothorax, mesothorax, except two entire central yellow 

 lines and a short line over tegulaj, scutellar region, two basal and 

 an apical spot on metathorax, sutures of pleura, spot on all the 

 coxa?, a line on all the femora above or within, spot near apex of 

 first abdominal segment and all the remaining segments except 

 broad apical margins, black ; antenna black above, fuscous be- 

 neath, scape beneath and a narrow annulus on flagellum, yellow; 

 wings yellow-h^'aline, dusky at tips, stigma and nervures fulvous; 



