124 BULLETIN (i."^, UNITED STATES NATIONAL MUSEUM. 



arcuate; internal border quite strongly arcuate; apical margin trans- 

 versely or more or le<s obliquely truncate and scarcel}^ defined from 

 the apex at internal fourth. Apex small, triangular, and acute at tip. 

 finely setose. 



Appendage quite large, strongly flattened, and semielliptical, Avith 

 its external margin directly continuing the line of the external border 

 of the dorsal plate; setose, seta? short and flying. Fossa transverse 

 and narrow. 



Superior pudendal memhrane reaching to the apical fourth of the 

 dorsal plate, and more or less irregularly rugulose. 



Hahitat. — Forma typica. — Kansas; Nebraska; Colorado (Buena 

 Vista, July, elevation 7,900 to 8,000 feet ; Robertson, Warren Knaus ; 

 Denver, October, II. Soltau; Colorado Springs; summit of Veta Pass, 

 July, C. V. Riley; Gulnare, Las Animas County, July and August, 

 Calif. Acad. Sciences). Texas (El Paso). Oklahoma (^Nlangum, 

 Januar3^ H. S. Barber) ; Utah; Arizona (Winslow, July, Barber and 

 Schwarz ; Chiricahua Mountains, June ; Fort Grant ; Flagstaff, July ; 

 Hmiiphreys Peak at the base, F. H. Snow). Xew Mexico (Las 

 Vegas, July). Wyoming (Big Horn Mountains, July, R. P. Currie; 

 Dead Indian Creek; Cheyenne). ^Montana ; Dakota; Idaho; Eastern 

 Oregon; British America (Medicine Hat). 



Forma convexicollis. — Wj'oming (Lamarie) ; Montana. 



Forma cognata typica. — Arizona (Pinal IMountains, Wickham). 

 Colorado (Gulnare); Utah; New Mexico (Cloudcroft, D.OOO feet, 

 August, Warren Knaus). 



Forma cognata punctata. — New Mexico; Colorado (Edith, May). 



Forma elongata. — Arizona (Pinal Mountains, Wickham). 



Number of specimens studied, 500. 



Type destroyed. 



Type-locality. — " Country of the Arkansas and Platte"'' (Say), 



Salient type-charactei's. — Oblong-subovate. Head acutely punc- 

 tured. Thorax subcpiadrate, punctures smaller than those of the 

 head and more distant; lateral edge regularly arcuate; apex A^ery 

 slightly emarginate; base nearly rectilinear, a little arcuate each side 

 near the angles, which are obtuse. Elytra destitute of stride, or dis- 

 tinctly regidar series of punctures, scabrous with minute slightly 

 elevated points, each of which pi-ecedes a puncture (Say). 



Diagnostic characters. — The anterior femora are armed in the 

 males, and in both sexes the elytra are sculptured with approximate 

 rows of rather course punctures, characters not observed in any 

 species of Melaneleodes. In granulata and its races the elytra are 

 sculptured with small, fiat tubercles arranged in series, with inter- 

 vening scattered acute elevated points. In letchcri the elyti-a are 

 clothed with ver}' sparsely placed, long flying hairs; in oandykei the 



