150 AMERICAN COLEOPTERA. 



antennae. Prothorax nearly one-half wider than long, widest at mid- 

 dle, sides arcuate, minutely sinuate at the hind angles. Elytra parallel, 

 barely two-fifths wider than the prothorax, three and one-third times 

 as long and about two-thirds wider than the prothorax. Basal joint 

 of hind tarsus very little longer than the next two. Length, 4.4 mm. ; 

 width, 2.25 mm. 



Described from a single specimen taken by the late Prof. 

 Snow in the Santa Rita Mountains, Arizona (8000 feet). 



The type is a male having the last ventral truncate at mid- 

 dle and with two very short longitudinal incisions delimiting 

 a sub-rectangular median lobe, which is moderately deeply 

 impressed, the impression extending forward to the middle 

 of the segment. By Horn's table this species will fall near 

 atriceps, which, according to description, has the head black, 

 the upper surface subopaque and more distinctly punctate, 

 and the basal joint of hind tarsus much longer. 



Li. curvatus n. sp. 



Oblong oval, pale yellow above, head brownish, antennas entirely 

 pale, body beneath brownish or piceous, legs pale, the femora more 

 br less brown. Upper surface highly polished and subimpunctate 

 throughout, the punctures very fine, sparse and feebly impressed. 

 Joints 2-3 of antennae subequal, together fully as long as the fourth. 

 Front obtusely convex between the antennae, impressed above the 

 flattened tubercles. Prothorax rather large, moderately transverse, 

 sides rounded and a little narrowed behind. Elytra one-third wider 

 than the prothorax and a little more than two-fifths longer than wide. 

 Basal joint of hind tarsus not longer than the two following. Length, 

 3 mm. ; width, 1.7 mm. 



Bishop, California. A single pair collected and kindly 

 given me by Dr. Fenyes. 



In the male the tibiae are all curved at base, the basal joint 

 of the front and middle tarsi is slightly dilated and the last 

 ventral has an impressed median lobe, formed nearly as in 

 the preceding species. In the female the tibiee are straight, 

 the basal joint of the four anterior tarsi more slender basally, 

 and the last ventral is of the usual form for this sex. The 

 color, relatively broad prothorax, nearly impunctate upper 

 surface and curved male tibise easily distinguish this species 

 from any other known to me. 



