AMERICAN COMPONENTS OF THE TENTYRIIN-<E 499 



divisi,** — the generic difference between Datulms and Batuli- 

 odes would be extremely radical on that account alone, but the 

 form of the anterior margin of the clypeus, as described by that 

 author, is probably correct, being more easily observed under 

 low power, and even this would amply suffice for generic dis- 

 tinction, irrespective of the different form of the prothorax and 

 the sparse erect pubescence. We have but a single species as 

 follows : — 



Form oblong, convex, pale rufous in color, shining, sparsely pilose ; pro- 

 thorax more than twice as wide as long, muricately punctate, densely 

 ut the sides, the latter strongly rounded, the apex emarginatc, the 

 base truncate, the angles obtuse ; elytra with less approximate 

 punctures, subseriately disposed. Length 3.5 mm. Southern 

 California (Vallecito and Gila) setosus Lee. 



Both this species and rotundicollis appear to be very rare, or 

 at least seldom taken ; possibly they may feign death and their 

 pale coloration would then render them difficult to distinguish. 



Batuliodes n. gen. 



The generic diagnosis above given is derived from a single 



rather delapidated individual, without legs, save the femur and 



tibia of one of the intermediate pair, so that I have been unable 



to describe the tarsi. These are said by Horn (Rev. Ten., p. 



270), to be short and spinose beneath, probably in setosus, but 



without much doubt somewhat similar in the following type 



species of Batuliodes^ which may be thus briefly outlined : — 



Body minute, evenly convex, polished, glabrous, pale brownish- 

 testaceous in color throughout ; head transverse, moderate, evenly 

 and feebh- convex, rather coarsely, closely and roughly punctate, 

 each puncture attended by a feeble external carina ; antennae 

 slender, almost as long as the head and prothorax, the latter four- 

 fifths wider than long, very much wider and a little longer than 

 the head, the sides rather strongly arcuate, more converging and 

 less arcuate toward base, the latter truncate and much narrower 

 than the apex, which is broadly, feebly sinirate, the side margins 

 acute, the surface rather coarsely, sparsely and simply perforato- 

 punctate and polished, abruptly more densely and confluently so 

 near the sides ; elytra equal in width to the prothorax and two 

 and three-fourths times as long, oval, the sides evenly arcuate, 

 strongly and evenly rounding at base to the transversely truncate 

 base of the elytra, which is laterally exposed beyond the very 

 obtuse thoracic angles, the apex obtusely parabolic ; surface 

 with regular, unimpressed series of small, not very close-set 



