224 GEORGE H. HORN, M. D. 



brnnnea Fab. — Similar to flavida, with the epipleural margin and 

 underside brownish, and often with a slight metallic lustre. 



suilla Fab. — Head and thorax brown, with a slight metallic lustre. 



costipennls Cr. — Head and thorax bi-ightly metallic, elytra brown 

 with yellow cost;e. In this variety Lef'evre has changed the name 

 to Crotchii, ignoring the fact that his own name, costipennls, is four 

 years younger in date. 



In all these varieties will be found subordinate variations in the 

 costae of the elytra. In the normal form there are seven costse of 

 equal width with the spaces between them, these latter with two ir- 

 regular rows of punctures. In other specimens, notably the costi- 

 pennis forms, but four costse are seen, the intervals between them 

 wider and with more numerous punctures. 



Between all these forms there are intermediate specimens, and any 

 attempt to se])arate them as species will be found impossible. 



For this species there seems to be some disagreement as to the 

 name, Crotch adopting the name used by me, and Lefevre using 

 suilla. There can be no doubt that brunnea Fab. applies to this 

 insect, as will be seen by referring to the supplenjentary description 

 by Olivier, but by accident Olivier omits to give credit to Fabricius 

 for this species, although there can be no doubt that he had the same 

 species, and probably specimen as had Fabricius. 



Widely distributed over the entire region east of the Rocky Moun- 

 tains extending to Arizona. 



C. nigrocyanea Crotch, Proc. Acad. 1873, p. 4.5.— Oval, facies rather ro- 

 bust, dull blue-black, feebly shining. Antennte pale at base, outer five joints 

 piceous. Head coarsely, deeply and moderately closely punctate, a distinct me- 

 dian frontal impression. Thorax nearly twice as wide as long, narrowed in front, 

 sides strongly arcuate posteriorly, margin slightly irregular, hind angles alone 

 prominent, disc convex, very coarsely, deeply and rather closely punctate. 

 Elytra very coarsely and deeply punctate, punctures irregularly placed, but with 

 a feeble strial arrangement near the apex. Body beneath piceous, shining, with 

 a slight seneous lustre. Propleurse not closely punctate, metasternum quite 

 smooth, abdomen sparsely indistinctly punctate. Legs piceous. Length .20 — 

 .22 inch. ; 5 — 5.5 mm. 



The sexual characters are as in the preceding species. 

 No variation has been observed, except that in some specimens the 

 thorax is irregularly punctate, having smooth spaces. 

 Occurs in Arizona, Tucson (Wickham). 



