KEHN AND HEBARD 231 



II. Form very robust and truncate. Convex callosity of 

 lateral lobes moderately broad. Distal portion of abdomen, 

 including cerei, tawny. Cerci similar to those of cinereus. 

 Ventro-external margins of caudal femora bearing normally 

 two and three spines.'^ ictus (Scudder) 



GG. Cerci with distal portion more strongly produced and 

 distinctly curved outward, the depression of the same being more 

 decided on the inner side. (Form very robust. Fastigium of 

 vertex strongly ascending, greatest width slightly less than one- 

 half that of proximal antennal joint. Eyes large and protruding. 

 Convex callosity of lateral lobes exceedingly narrow. Abdomen, 

 including cerci, mahogany red. Ventro-external margins of 

 caudal femora bearing normally three and four spines.' 



angustifrons (Redtenbacher) 

 FF. Tympanum of tegmina unusually elongate. Convex callosity 

 of lateral lobes very broad. Vertex distinctly produced.* 



G. Coloration not unusually brilliant; dorsum of abdomen 

 narrowly, but usually strikingly, trifasciate. Cerci normally 

 green, of similar type to those of fasciatus but distinctly more 

 elongate and attenuate, with distal portion very strongly de- 

 pressed (as in C. gracillimus). Ventro-external margins of 

 caudal femora sometimes unarmed, sometimes supplied with 

 one to three spines. insularis (Morse) 



GG. Coloration unusually brilliant; wings iridescent; dorsum 

 of abdomen broadly, but not strikingly, trifasciate. Cerci 

 burnt lake, slightly longer than in fasciatus, distal portion weakly 

 but distinctly curved outward, with broadly rounded apex 

 briefly but strongly depressed. Ventral margins of caudal 

 femora unarmed. iriodes new species 



EE. Cerci with distal portion very greatly produced, very elongate 

 and attenuate, very weakly depressed distad, with apex strongly 

 acuminate. (Fastigium of vertex about one and one-half times 

 width of proximal antennal joint. Convex callositj^ of lateral lobes 

 very broad. Dorsum of abdomen normally infuscated, cerci dark. 

 Ventral margins of caudal femora unarmed.) strictus (Hcudder) 



^ A number of specimens from the state of \'era Cruz, Mexico, have the 

 ventral margins of the caudal femora unarmed, but are otherwise typical of 

 smaller individuals of the species, as are the spechnens showing the variation 

 remarked in the preceding foot-note. 



' In this species the armament of the ventral margins of the cephalic and 

 median tibiae is decidedly unusual, in every specimen before us at least one of 

 these margins bears seven, instead of six, spines. 



8 As in C. gracillimus, which has the vertex even more distinctly produced, 

 the occiput ascends evenly toward the vertex, the vertex ascending slightly 

 more decidedly but very nearly in the same plane. 



TRANS. AM. EXT. SOC, XLI. 



