82 MEMOIRS ON THE COLEOPTERA 



as long as the elytra; scutellum slightly wider than long, ogival; 

 elytra scarcely narrower than long, together subcircularly rounded 

 from about the middle, parallel at the sides thence to the base; 

 reticulation everywhere notably less fine than in the preceding and 

 with rather more confused sculpture; the lunules are moderate in 

 size, those of the intermediate series, internally, small, but they 

 rapidly become nearly as large as those of the principal series and, 

 externally, are broad and almost transversely anastomosing; sterna 

 as usual; post-coxal plaques longer than in the preceding and para- 

 bolic; second joint of the hind tarsi in the apparent male the hind 

 tibiae rapidly broader from the base slender, about three times as 

 as long as the first and longer than the remainder but with simple 

 coarse pubescence beneath. Length 1.45 mm.; width 0.83 mm. 



Louisiana (Alexandria). A single example confusus n. sp. 



15 Body broadly oval as in the preceding section 16 



Body narrowly oval, somewhat as in oindatus and vimdus 19 



1 6 Post-mesocoxal plaques sharply angulate behind, the angle finely 



produced 1 7 



Post-mesocoxal plaques rounded behind; body much smaller; prosternal 

 process with few or no short apical hairs; second hind tarsal joint 



long but slender and not padded beneath 18 



17 Apex of the prosternal process broadly expanded and bearing six or 

 seven hairs, rather stiff but very moderate in length. Body oblong- 

 oval, subparallel, the elytra rapidly rounding and extremely obtuse 

 at apex, shining black, the elytra feebly opalescent; under surface 

 dark rufous; head large, more than half as wide as the prothorax, 

 the punctures numerous, impressed and unusually distinct, the eyes 

 large; antennae moderately long and slender; prothorax large, slightly 

 more than twice as wide as long, but little less than half as long as 

 the elytra, the strongly converging sides rather feebly arcuate; surface 

 minutely, sparsely punctulate, feebly reticulate except apically, the 

 basal margination and lobe pronounced; scutellum ogival, about as 

 long as wide; elytra but slightly longer than wide, the feebly arcuate 

 sides only slightly converging nearly to the apex; surface very finely, 

 closely strigilate, the lunules large, semicircular, those of the inter- 

 mediate series nearly as large as the others; toward the sides all 

 become very broad, close-set and confused in arrangement; meta- 

 sternum broad, with oblique sides between the coxae, the meso- 

 sternum gradually sloping from its apex; finely prolonged posterior 

 apex of the post-coxal plaques outwardly oblique; second joint of 

 the hind tarsi slender, more than twice as long as the first but not 

 as long as the remainder. Length 1.7-1.85 mm.; width 1.1-1.25 

 mm. Texas (Brownsville), Wickham. Seven females. 



socialis n. sp. 



Apex of the process moderately expanded and never having more than 

 two to four very short slender hairs, the sides of the process rather 

 strongly beaded. Body more oval, very shining and convex, deep 

 black, dark rufous beneath; head half as wide as the prothorax, 

 smooth and polished, the eyes moderate; antennae slender, the club 

 shorter than the funicle; prothorax everywhere very smooth, 



