70 



PROCEEDINGS OF THE ACADEMY OF 



[1881. 



of abdomen, 3 mm. ; of prothorax, 2 mm. Color, livid yellow. 

 Fore-wing, 14 mm. long; venation as in PI. X, fig. 17. 



Male. — Length, 5 mm. ; length of fore-wing, 5^ mm. Color, 

 livid yellow ; the head, upper part of thorax and dorsum of abdo- 

 men blackish. The mandible has one feeble tooth at the tip, and 

 two others shorter and feebler. 



Habitat. — Southern Colorado, occupying subterranean formica- 

 ries with small gravel-covered exterior moundlet, pierced by one 

 central gallery. 



ALPHABETICAL KEY TO REFERENCES IN THE 

 PLATES. 



The references are uniform in application throughout all the 

 figures. References which occur only once, and are explained in 

 the " Explanation of Plates," are not placed in the Key. 



«6., abdomen. 

 ab. pi., abdominal plate. 

 ah. pi. (Z, abdominal plate dorsal. 

 ah. p>l. I', abdominal plate ven- 

 tral, 

 a??, anus. 



an. sp, scape of antenna. 

 ant^ antennse. 



he. s, buccal or mouth sac. 

 h. gz^ bowl of gizzard. 

 hn. gz, button of gizzard. 

 h. ms, branched muscles. 



CL, Clypeus. 



G. ms, crop muscles. 



Col, colon. 



Cy. gz, cylinder of gizzard. 



D, dorsal. 



E, epithelium. 



E. I. s, epithelium imbricated, 

 serrate edge.] 



E. ab. pi, exterior abdominal 



plate. 

 Epc, epicranium. 



f. ar, frontal area. 

 fe77i, femora. 

 Jig, flagellum of antenna. 

 fm, foramen. 



yz, gizzard. 



hy, hypopygium. 



i. ah. pZ, interior abdominal plate. 



il, ileum. 



il. V, ileo-secal valve. 



in, intestine. 



lb, labium. 



lb. p, labial paljjs. 



Ibm, labrum. 



vih, mandibles, 

 mo, mouth. 



