COLEOPTERA OF BAJA CALIFORNIA. 373 



fine punctures. Legs pale. Length .48 £ -.54 inch.; 

 12— 13.5 mm. 



This species belongs to the series in which the male 

 has a spinulose area on the anterior side of the middle 

 tibiae at apex, and by the narrow propleurae is allied in 

 our fauna to herbaceus and ruficauda. It is notable 

 among our species in having the moderately wide pale 

 margin to the elytra. 



I have not been able to assign a satisfactory position 

 to the species by the method suggested by Chaudoir 

 (Annali Mus. Civ. Genova, 1876), the subdivisions based 

 on the punctuation of the abdomen are purely artificial, 

 and their limits inappreciable. 



Two specimens from Custer, South Dakota, sent me 

 by W. D. Hunter of the University of Nebraska. I 

 have named the species in allusion to him. 



Sacium hemipterum n. sp. 



Broadly oval, scarcely a fourth longer than broad; color 

 above yellowish testaceous, with nearly the basal half of 

 the elytra piceous, surface shining, sparsely pubescent. 

 Head piceous. Thorax very sparsely punctate, more than 

 twice as wide at base as long, hind angles acute. Elytra 

 more coarsely punctate than the thorax, punctures sparse, 

 pubescence fine and yellow, color of basal half piceous 

 black, the apical portion yellowish testaceous and trans- 

 lucent, the division between the colors sinuous. Body 

 beneath, abdomen, and hind, legs piceous, prothorax 

 beneath and four front legs yellow. Length .04 inch. ; 

 1 mm. 



This species is more broadly oval than any known to 

 me in our fauna, and is notably different in the coloration 

 of the elytra. 



One specimen. San Jose del Cabo. 



