7O MEMOIRS ON THE COLEOPTERA. 



but little wider than long, subinflated basally, the eyes moderate, con- 

 vex; antennae blackish, paler basally, unusually short, gradually strongly 

 incrassate distally, the third joint but little longer than the second, fourth 

 much shorter than wide, the compact outer joints very short, more than 

 twice as wide as long, the last almost globular, but little longer than wide; 

 prothorax three-fourths wider than long, the sides feebly converging 

 and broadly arcuate nearly from the rounded base to the apex; surface 

 ( 9 ) not at all impressed at base; elytra as wide and long as the prothorax; 

 abdomen with thick margins, at base as wide as the elytra, thence evenly 

 though only just perceptibly narrowing, with straight sides, to the fifth 

 tergite. Length 1.45 mm.; width 0.35 mm. Texas (Austin). 



Very evidently distinct in its slender form, unusually short and 

 rather strongly incrassate antennae, sculpture, as detailed above, 

 and other features. 



Tinotus densiventris n. sp. Slender, moderately convex, subparallel, 

 not shining, the abdomen moderately so, dark red-brown in color, the 

 head and abdomen, except the segmental apices, blackish, the legs pale 

 brown; sculpture anteriorly somewhat as in parvicornis, on the abdomen 

 still denser, asperate, subimbricate only at base ; head nearly as in the pre- 

 ceding but with more developed eyes, the antennae longer, blackish, paler 

 basally, the fourth joint nearly as long as wide, tenth barely twice as 

 wide as long, the last distinctly elongate; prothorax well developed, 

 convex, more transverse than in the preceding, the sides rounded, more 

 converging anteriorly, the surface unimpressed at base; elytra as wide 

 and as long as the prothorax; abdomen in form and proportion nearly 

 as in parvicornis but much more densely punctate. Length 1.5 mm.; 

 width 0.38 mm. Texas (Waco). 



Distinguishable from the preceding, which it much resembles in 

 outline, by its longer antennae and very much denser and strongly 

 asperate abdominal sculpture. The female type is very well 

 matched by another female example, taken by Prof. Wickham 

 at Riverside, Arizona, except that in the latter the prothorax 

 seems to be a trifle shorter and more transverse, the coloration 

 darker and the tarsi relatively longer. 



The last antennal joint in several species of this genus exhibits 

 distinct traces of a submedian constriction, analogous to that 

 alluded to under the genus Thiasophila, and it may be a more general 

 character than I formerly thought; it is distinctly observable in 

 almost all the species of Oxypoda. 



Xenodusa Wassm. 



The American species hitherto referred to Lomechusa and Atemeles 

 have been separated by Dr. Wassmann under the above name; 



