l62 ENTOMOLOGICAL NEWS [April, '09 



With careful collecting in the northern parts of Nevada, I 

 believe that forms might be discovered with characters so inter- 

 mediate that we would be compelled to reduce this species to a 

 variety of C. ty-notata. So far no connecting links have been 

 discovered. 



Brachyacantha blaisdelli n. sp. 



Oblong, not very convex. Head, yellow in the $, black in the $ 

 and with a large yellow spot placed vertically, shining, finely but 

 thickly punctured with very shallow punctures. Thorax of $ , black, 

 slightly more heavily punctured than the head, a broad yellow patch 

 laterally, and with front and side margins lined with a narrow pale 

 or whitish yellow band. Thorax of 5 , black, punctured as in the 

 male, with a broad yellow patch laterally but with light marginal band 

 only found on the side margins and ending abruptly at the front angles. 

 Elytra, black, shining, the punctures the same as on the thorax. Each 

 elytron with a fascia and a sub-apical spot. The fascia is placed in 

 front of the middle, is narrowest at its outer part where it touches 

 the margin, but on the inner edge, is dilated into an irregular rounded 

 blotch which does not quite reach the suture and which gives off a 

 spur that runs parallel with the suture until it joins the sub-apical spot 

 thus forming a sort of vitta. The confluence of the spur with the 

 sub-apical spot is found in the $ but not in the $. Under side of 

 thorax yellow; not strongly punctured; of body, black; femur, dark; 

 knees, tibia, and tarsi testaceous. L. .18 to .20 in inch; w. .12 to .15. 



Description based upon $ and 9 taken at Goldfield, Nev.. 

 VI, 29, '07, by the author. Have also several other specimens 

 from same locality and have seen several specimens taken by 

 Dr. F. E. Blaisdell, at Mesa Grande. Sonoma Co., Calif., and 

 one taken by Mr. F. C. Clark at Napa, Calif. 



This species is closely related to B. dentipcs Fab. but can be 

 readily separated from it by the following characters : the form 

 more narrow and less convex, by B. dentipcs, having the mark- 

 ings of the front and sides of the thorax of the same color, 

 orange, while B. blaisdelli has them of a different color, and 

 with the front margin narrower. The tubercles in B. blaisdelli 

 are more prominent and with a greater space between them : 

 the fourth, fifth and sixth ventral segments are depressed, and 

 the spine of the anterior tibia is not so strongly developed as 

 it is in B. dentipes. 



