184 Goleopterological Notices, III 



and from one-half to three-fourtlis wider than the latter, the humeri obliquely 

 truncate ; disk with even rows of deep and moderately distant punctures 

 which are quite moderate in size. Length 14.0-16.5 mm. ; width 5.5-7.0 mm. 



Southern California and Arizona. 



The series of ten specimens which I have before me indicates but 

 slight variation in this rather abundant and well-known species. 

 I obtained a number of specimens at Yuma in December, mostly 

 in copula and entirely exposed to the intense heat of the sun on the 

 surface of loose dry sand ; the fact that complete desiccation does not 

 take place very soon under these conditions is only to be accounted for 

 by the unusual density and thickness of the integuments, the latter 

 being characteristic of most of the desert-loving Curculionidae and 

 Tenebrionidae, and undoubtedly developed from their peculiar en- 

 vironment. 



Two specimens from Guerrero, Mexico, collected by Mr. Baron, 

 do not differ from the typical forms to any perceptible extent. 



D. wickhami n. sp. — Elongate, suhparallel, rather convex, black, 

 somewhat dull, densely clothed with white and brown squamiform pubes- 

 cence. Head sparsely punctate ; beak nearly twice as long as wide, shorter 

 than the prothorax, obscurely bivittate, more sparsely clothed along the 

 middle and on the flanks. Prothorax about as long as wide, constricted and 

 briefly tubulate at apex; sides parallel and nearly straight ; antero-lateral 

 angulations small and tuberculiform ; base broadly angulate, feebly lobed in 

 the middle ; disk moderately coarsely and rather sparsely punctate, almost 

 impunctate near the middle, impressed in the middle near the base ; pubes- 

 cence dense in a sublateral sinuous vitta, also in a narrower medial line. 

 Elytra twice as long as wide, nearly three times as long as the prothorax and 

 fully two-fifths wider than the latter ; sides parallel and nearly straight, 

 obliquely convergent in apical third, the apex narrowly subtruncate and 

 emarginate ; humeri obliquely truncate ; disk with unimpressed rows of com- 

 paratively small and not very close-set punctures, the white vestiture dense 

 on the flanks and in a broad discal vitta, the brown prevailing in a broad 

 intermediate vitta and also throughout the sutural interval, a few small sub- 

 denuded spots are irregularly distributed from outer third to the sutural 

 interval, one at lateral third just before the middle and a few still smaller, 

 nearer the suture and just behind the middle especially evident. Abdomen 

 very densely clothed with white vestiture, feebly speckled with minute sub- 

 denuded points, the last three segments more sparsely pubescent toward base, 

 a small rounded depressed area at the middle of the apex of the first segment 

 also subdenuded. Legs rather long and but moderately stout, the femora not 

 annulate. Length 11.5 mm. ; width 4.8 mm. 



California (Colorado Desert at Indio — about 100 feet below the 

 sea-level). Mr. H. F. Wickham. 



