330 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



Washtiicna, no dates given. Bruner's material, comprising five speci- 

 mens, all females, from Washington, was also studied. 



Besides the type, a single female from Dakota, the Museum of Com- 

 parative Zoology has a mature pair labeled as having been taken in 

 Oregon in the month of June. This male has an intestinal worm, 

 Mernus sj). protruding at least eight inches from the tip of the abdomen. 



The dissimilarit}^ of the cerci of the two males critically studied is 

 indicative of two distinct forms. The form with cerci like tig. 34 

 is heavier and more robust in both sexes and the posterior femora 

 seem broader. The lower margins of the lateral lobes of the pronotum 

 are not pallid, as seems to be constantly the case with the other form, 

 and the general color is apparently somewhat lighter. The habitat of 

 the two forms are the same, however, and there are certain tendencies 

 toward variation which make it seem best for the present to consider 

 the two forms varietal rather than as distinct species. I therefore pro- 

 pose the varietal name rol>usta for the heavier form. The maxinumi 

 of the above measurements are from this variet}- . 



Type.—Q^it. No. 10168 U. S. National Museum. 



EREMOPEDES Cockerell. 



Eremopedes Scudder, Can. Ent., XXVI, 1894, pp. 178, 181 (invalid, no described 

 species included); Guide Orth. N. A., 1897, p. 56 (invalid, no described 

 species included); Cat. Orth. U. S., 1900, pp. 78, 97; Proc. Davenp. Acad. 

 Nat. Sci., IX, 1902, p. 55.— Cockerell, Ann. Mag. Nat. Hist. (7), II, 1898, 

 p. 323.— Caudell, Can. Ent., XXXIII, 1902, p. 100.— Kirby, Syn. Cat. 

 (3rth., II, 1906, p. 192. 



Description. — Head moderate in size; vertex narrow, one-half, or 

 less, as broad as the interocular space except in hrevlcauda., where it is 

 nearly as wide. Pronotum moderately large and well produced pos- 

 teriorly, without carina?, or with mere indications of lateral carinji? on 

 the posterior margin in one species, or obscure but persistent in hrevi- 

 cauda. Lateral lobes of the pronotum well developed except in a 

 single species. Prosternum typically unarmed, but there are in some 

 species a pair of fairly distinct spines present in some specimens. Wings 

 wholly concealed in the female, in one species a little exposed; in the 

 male the elytra are broad, overlap above, and project somewhat he3^ond 

 the pronotum. Legs moderately slender, the posterior femora more 

 than two times as long as the pronotum and moderately to considerably 

 swollen on the basal two-thirds; anterioi- tibia? armed above on the 

 outer margin onh^ with three spines. Abdomen moderately large and 

 plump, scarcely carinate, the terminal segment deeply cleft, especiall}^ 

 in the male (fig. 37); supraanal plate small, triangular, deeply sulcate 

 above in the middle, the whole nearly hidden beneath the last abdomi- 

 nal segment; cerci simple in the female, in the male more or less sinu- 

 ate and with a blunt tooth-like projection on the inner side; ovipositor 



