NORTH AMERICAN COLEOPTERA. 39 



The yellow color at the base of the elytra occupies usually a little more 

 than a third of their extent ; specimens sometimes occur with the elytra 

 almost entirely yellow. The thoracic sculpture consists almost entirely 

 of the punctures which are usually the coarse ones of the other species, 

 they are, however, rather fine, while the usual fine punctures are almost 

 entirely absent. 



Widely difiused in the eastern region as far as Texas. 



H. gracilis n. sp. — Form i-ather slender, pieeous, moderately shining, very 

 sparsely fulvo-pubescent, legs and antennae rufo-testaeeous. Antennse slender 

 feebly serrate, extending slightly beyond the hind angles of the thorax. Head 

 convex, moderately shining, front slightly flattened, punctuation intermixed but 

 not close. Thorax longer than wide, narrower at apex, sides arcuate in front, 

 slightly sinuate before the hind angles, basal plicae distinct but short, disc convex, 

 shining, rather densely and very finely punctulate with not very conspicuous 

 coarser punctures intermixed. Elytra not wider than the thorax and about twice 

 as long, arcuately narrower to apex, striate, striae rather closely punctate, intervals 

 feebly convex, very sparsely punctulate. Body beneath shining, finely closely 

 punctate, the intermixed coarser punctures very evident on the flanks of the pro- 

 thorax but not on the abdomen. Claws rectangularly dentate from the middle to 

 the base. Length .24 inch ; 6 ram. 



This is one of the most slender species in our fauna. The form of 

 the thorax is somewhat intermediate between the two preceding species 

 and those which follow ; the base, however, is as broad as the widest part 

 a little in front of middle. 

 Occurs in western Nevada. 



H. exoletus Erichs. — Form slender, brown or nearly pieeous, sparsely and 

 finely cinereo-pubescent, moderately shining, antennae and legs testaceous. Au- 

 tennse slender, extending slightly beyond the hind angles of the thorax. Head 

 convex, closely punctate, the coarser punctures conspicuous. Thorax one-fourth 

 longer than wide, apex narrower than base, sides moderately arcuate, hind angles 

 not divergent, basal plicae distinct but not large, disc convex, moderately closely 

 punctulate with not conspicuously coarser punctures intermixed. Elytra not wider 

 than the thorax, humeri distinct, sides gradually arcuateh'^ narrowing from the 

 humeri to the apex, surface rather deeply striate, striae coarsely punctate, intervals 

 convex in their entire extent, 2-3-5-7-9 at apex more elevated and costiform, their 

 surface obsoletely punctulate with coarser punctures intermixed, the latter not 

 conspicuous on the abdomen. Claws cleft at tip. Length .22-28 inch; 6.5-7 mm_ 



This species is rather more slender and the thorax longer than in 

 Uhlerii, and with an intermixed punctuation. The color of the two is 

 also difiierent. In admitting this species as an inhabitant of our fauna 

 the determination has been made by very careful comparison of my 

 specimens with a type sent me some years ago by Dr. Candeze. I have 

 seen but two specimens, both smaller (1 mm.) than the South American 

 specimens. 



Occurs in southwestern Texas. 



