156 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



The shape of the median fascia in the fully colored female is differ- 

 ent from any of the other species which, with the more slender form, 

 entirely pale palpi, basally arcuately dilated sutural vitta, and the 

 inner claws of the male distinctly cleft should make this an easily 

 recognizable species. Occasionally specimens of typical femoralis 

 have the palpi more or less reddish and the basal part of the sutural 

 vitta gradually dilated toward base but these differ, besides the more 

 robust form, in having the head, sides of pro thorax and the entire 

 underside red. 



AULICUS NIGRIVENTRIS, new species. 



Head black, coarsely and moderately closely punctate, denser at 

 sides and apex; palpi black; antennae black, the first three or foui 

 joints reddish, basal joint black above. Prothorax black, rathei 

 sparsely punctate, punctures coarse. Elytra moderately closely 

 punctate; intervals between the punctures more or less rugose; 

 black humeral spot present ; sutural vitta towards base rather strongly 

 arcuately dilated ; median fascia broad and generally arcuate laterally ; 

 underside and legs black with metallic blue tint; ventral segments 

 either entirely bluish-black or very narrowly margined at sides with 

 red; fifth ventral segment of male broadly emarginate at apex and 

 last dorsal segment sub triangularly emarginate, in the female trun- 

 cate, all the claws of both sexes simple. Length, 8-10 mm. 



Mexico (Van Zwaluwenburg) ; Torreon, Coahuila, Mexico (McKinney 

 and Loftin); Chiricahua Mouutains, .^rizona (Owen). 



Type and allotype —Cut. No. 23084, U.S.N.M. 



Described from fifteen specimens, as follows: Type a male from 

 Mexico without definite locality and allotype from Torreon, Coahuila, 

 Mexico, June 28, 1918 (McKinney and Loftin) in United States 

 National Museum; paratypes from Mexico (Van Zwaluwenburg) in 

 collections of the Massachusetts Agricultural College, the Brooklyn 

 Museum, and Mr. Chapin, and from the Chiricahua Mountains, 

 Arizona, in the collection of Dr. E. C. Van Dyke. 



A large robust species, which varies very little in elytral maculation, 

 though the elytral sculpture is perhaps more variable than in any of 

 our other species. The subcordiform basal part of the sutural vitta 

 is very pronounced and separates this species readily from the other, 

 except Jlissipes, which is a much smaller and less robust insect, with 

 pale palpi, differently colored abdomen, and the male with one claw 

 of all the tarsi distinctly cleft. 



AULICUS NERO Spinora. 



Aulicus ncro Sfinola, Essay monogr. sur les Olerites, vol. 1, 1844, p. 330, pi. 27, 

 fig. 5.— Chenu, Encycl. d Hist. Nat. Col., vol. 2, 1860, p. ISO .— Schenkling, 

 Bull. Mus. Paris, vol. 8, 1902, p. 325.— Horn, Trans. Amer. Ent. Soc, vol. 2, 

 1868, p. 134; Proc. California Acad. Sci., ser. 2, vol. 4, 1894, p. 331— Wol- 

 cott, Field Mus. Chicago, Zool. Series, vol. 7, 1910, p. 364. 



Head black, coarsely and densely punctuate; palpi black; antennae, 

 including the club, pale, or the outer joints, or only the club, black. 



