Coleopterological Notices, V. 593 



evenly rounded humeri to the apex, each elytron evenly and strongly rounded 

 at apex, without trace of truncature, slightly dehiscent at the suture toward 

 tip ; disk strongly, evenly, rather closely but not densely punctate. Legs 

 slender, moderate in length, the first joint of the hind tarsi a little longer 

 than the next two, not at all finely pubescent beneath. Length 9.5 mm. ; 

 width 4.4 mm. 



Utah (southwestern). 



This very distinct species may be placed at present near insta- 

 hiliH, which it resembles in general form and in the outline of the 

 prothorax. The truncate scutellum is however a feature which 

 differentiates it widely from that and nearly every other form ; in 

 dolorosa the scutellum is truncate, but otherwise that species is not 

 at all allied. Gaurotoides is only distantly related to hrevicornis. 



PTYCHODES Serv. 



The two species of this tropical genus which cross the southern 

 border of the United States may be known by the following char- 

 acters : — 



Pronotum and elytra with three cretate vittse, the sutural vitta extending to 

 about apical fourth or fifth and irregular in outline ; antennae longer, the 

 third joint more than twice as long as the fourth ; anterior legs of the male 

 greatly elongate, the femur about two-thirds as long as the elytra. 



trilineatiis Linn. 



Pronotum without trace of the median white vitta, the sutural vitta of the 

 elytra confined to basal fifth, where it abruptly and completely terminates ; 

 antennae shorter, the third joint rather less than twice as long as the fourth ; 

 anterior legs of the male less elongate, the femur not more than one-half as 

 long as the elytra. Head deeply, narrowly furrowed between the antennae, 

 the latter twice as long as the body, slender, the third joint gradually 

 thicker and strongly rugose toward base, eleventh distinctly shorter than 

 the third, very slender, the appendage nearly as long as the basal part 

 and just visibly arcuate. Prothorax scarcely as long as wide, coarsely, trans- 

 versely plicate. Elytra two and one-half times as long as wide, the lateral 

 vitta equal and continuous from the eyes nearly to the apex ; disk sparsely 

 punctate, strongly so toward base, clothed rather densely with short gray 

 hairs, also with scattered spots of reddish-ochreous pubescence of similar 

 structure. Length 23.0 mm. ; width 5.8 mm. Arizona. 



a1>l)reTiatus n. sp. 



The spots of dense ochreous pubescence are much more conspicuous 

 than in trilineatus {=vittati(S Fab.) and are less lineate in arrange- 

 ment ; the elytral punctures are stronger, and the sutural spines are 

 only one-half as long. A single male example. 



