COLEOPTERA OF BAJA CALIFORNIA. 437 



Male. — First joint of antennte not difformed, shorter 

 than second, this somewhat thickened and nearly as long 

 as the next three. Anterior tibia^ with two spurs. 



Keniale. — Second joint of antennae not thickened and 

 not longer than the first. 



The first two joints of the female antenna? are conspic- 

 uously cinereo-pubescent, in the male nearly glabrous. 

 In all the females before me there is a piceous spot each 

 side of the scutellum and in front of the humeral umbone, 

 not seen in the male. 



This species may be associated with tennis and un/'co/or 

 in the arrangement suggested by me some years ago 

 (Proc. Am. Philos. Soc, 1873, p. 89). 



Sonora, Mexico and San Jose del Cabo. 



Calospasta decolorata n. sp. 



Form rather short, deep violet, the elytra entirely red- 

 dish-yellow (male), or with an oval piceous spot on the 

 middle of suture. Antennae short, compact. Head 

 broadly oval, occiput truncate, surface coarsely irregu- 

 larly punctate. Thorax quadrate, broader than long, nar- 

 rowed for a short distance in front, disc feebly convex 

 without median impressed line, surface nearly smooth 

 with very indistinct scattered punctures (male), or with 

 coarse irregularly placed punctures (female). Elytra 

 much wider at base than the thorax sides parallel (male), 

 or slightly divergent (female), surface coarsely scabrous 

 with two feeble costa; on the disc near the suture. Body 

 beneath deep blue, sparsely silken pubescent. Legs blue, 

 sparsely hairy. Length, .30— .36 inch; 7.5—9 mm. 



In the male the last ventral segment has a small acute 

 notch, in the female truncate. The upper surface from 

 indications is sparsely clothed with short silken pubes- 

 cence. The spurs of all the tibiae are slender and sim- 

 ilar. 



