1 2 GEO. H. HORN, M. D. 



wanting. In no specimen has any evidences of a black humeral 

 umbone been observed. 



This species is probably distinct from any of the Mexican forms 

 as it extends its habitat more to the North. 



Occurs in Kansas and Arizona. 



COSCIIVOPTERA Lac. 



The species which occur in our fauna are, with two exceptions, 

 from the trans-Mississippi and southwestern regions of our country. 

 They divide quite sharply into two series already recognized by 

 La cord aire. 



Elytral puiictuatiou verj' confused, without any trace of a serial arrangement; 

 hind angles of thorax rounded ; form robust; mandibles of male stout, sub- 

 angulate externally Series A. 



Elytral punctuation subseriately arranged ; hind angles of thorax obtuse, but 

 quite evident; form more cylindrical; mandibles of male not obviously 

 different from those of the female Series B. 



Series A. 



The Species which belong to this series ap])roach Megalostomi.^ 

 more closely. They may be separated by the following table : 



Disc of thorax evenly and regularly convex ; punctuation dense and even ; a 

 smooth median line. 

 Thorax and elytra pitchy-black, no trace of humeral red spot..<Ioniiiiicana. 

 Thorax slightly green, elytra purple-black with a distinct humeral spot. 



semi Hilda. 

 Disc of thorax uneven and irregularly convex, the punctuation unevenly dis- 

 posed and rather coarse, no well defined sn)ooth median line. 



Elytra with an entire yellow vitta vittigera. 



Elytra with short vitta or humeral spot var. idem. 



C. doniinicaiia Fab., Syst. El. ii, p 34 ; Oliv., Ent. vi, 864, pi. 2, fig. 28. 

 franciscana Lee, Col. Kansas, 1859, p, 22. 

 dorsalis Lee, Trans. Am. Ent. Soc. 1874, p. 25. 



This species is so well known to all collectors as to need no com- 

 ment. 



The specimens from the eastern Atlantic region are less conspicu- 

 ously pubescent than those of the more western regions. C. fran- 

 ciscana was founded on a Kansas specimen, and it is rather odd that 

 a specimen from Arizona differing only in being particularly well 

 preserved should have again received a name. 



Widely distributed from the New England States to Dakota, to 

 Texas and Arizona, extending into Mexico. 



