134 MEMOIRS ON THE COLEOPTERA 



Cryptolestes adumbratus n. sp. Narrower and more parallel, shining, 

 rather dark testaceous throughout, the punctuation loose and the pu- 

 bescence short, decumbent and inconspicuous. Male smaller and shorter 

 than the female; head much narrower than the prothorax, the eyes very 

 moderate in size and prominence, not quite basal, the carinulate sides 

 above them nearly straight for two-thirds, then sinuously converging to 

 the truncate front; punctures fine and well separated; there is a distinct 

 canaliculation in about basal half of the length; antennae slender, not 

 quite as long as the body, the first three joints decreasing rather rapidly 

 in thickness, the first more than twice as long as wide, distinctly shorter 

 than the next three together, third slightly shorter than the second or 

 fourth, the outer joints slender and cylindric, mutually subequal in 

 length; prothorax transverse, two-fifths wider than long, the base dis- 

 tinctly narrower than the apex, widest near the apex, the sides arcuate, 

 becoming oblique and straighter posteriorly; basal angles sharp and 

 slightly prominent, the apical obtuse; surface flat, finely, rather sparsely 

 punctate, the part between the sublateral lines and the sides convexly 

 sloping, rugose, dull and with a very fine carinuliform line except apically; 

 scutellum very short and transverse, broadly rounded; elytra oblong- 

 oval, wider than the prothorax and not quite three times as long, the 

 parallel sides evenly and distinctly arcuate, the apex circularly rounded; 

 surface flat, each with three fine and slightly carinulate striae, the sub- 

 sutural obliterated basally, the intervals with rows of small indistinct 

 punctures, the sublateral carina strong; between this and the sides the 

 flat surface slopes very steeply and, just within the side margins, there is a 

 coarse deep groove. Female larger and more elongate than the male, 

 similar in sculpture, color and lustre, the head similar, the antennae 

 shorter, as long as the elytra, the outer three joints each much longer than 

 the preceding but only very slightly enlarged, the basal joint stout and 

 longer than the next two but not as long as in the male; prothorax not 

 quite so transverse and a little less narrowed basally; elytra much longer, 

 nearly twice as long as wide, otherwise similar; abdomen punctate through- 

 out, of the usual structure. Length (cf 9) 1.5-1.75 mm.; width 0.52- 

 0.62 mm. Texas (Borden). 



This species belongs to an isolated group of the genus hitherto 

 represented by punctatus Lee., and probably also by denticornis 

 Csy., and several allied Mexican species more recently described 

 by Dr. Sharp. The basal joint of the antennae is unusually elongate 

 in the males of all this group, though less so in the less highly de- 

 veloped males. In punctatus the first joint in this sex is notably 

 less elongate in some individuals than in others, but it will be noted 

 that it always bears the same proportional length, the entire antenna 



broader head; the antennae, also, are not quite so long, and the punctuation of the 

 under surface of the body, especially toward the sides of the head and prosternum, is 

 much less evident. Two discal foveae on the pronotum, arranged transversely, are 

 more or less visible in all three of the examples of these two species at hand. 



