HlSTERID^E 231 



converging posteriorly, the striae rather fine, very finely and feebly 

 crenulate; outer subhumeral half as long as the elytra; prosternal 

 striae much shorter than usual, barely more than half as long as 

 the prosternum, unusually approximate anteriorly, less so and trans- 

 versely united posteriorly; discal mesosternal stria entire, bent back- 

 ward at the sides; propygidium finely, not very sparsely punctate. 

 Length 2. o mm.; width 1.35 mm. Texas (Lee Co.). One example. 



contractus n. sp. 



Cephalic striae extending inward anteriorly and becoming more or less 

 approximate medially. Body black, with the elytra dull rufous, 

 nubilously black toward the scutellum, more elongate-oval than in 

 siibrotundiis, with the elytra not prominently inflated at the sides 

 basally; head minutely punctulate, concave only anteriorly; pro- 

 thorax more transverse than in subrotundus and almost as wide 

 as the elytra, the sides more arcuate, not abruptly more rounding 

 apically; elytra distinctly shorter than wide, the striae somewhat 

 coarse and deep but not in the least crenulate; prosternal striae 

 long as usual, diverging at base. Length 1.8-2.35 mm.; width 

 1.25-1.35 mm. Mexico (Tepehuanes, Durango), Wickham. Five 

 examples *wickhami n. sp. 



6 Prosternal striae converging anteriorly, widely distant at the posterior 

 margin, the intervening surface nearly smooth; anterior tibial 

 spinules numerous and subequal -. 7 



Prosternal striae parallel, widely separated throughout, the intervening 

 surface closely punctulate; tibial spinules numerous and subequal. 8 



Prosternal striae very short, converging, the space between them finely 

 punctulate, the base of the process not beaded; tibial spinules as 

 in the preceding sections 9 



7 Body briefly oblong-oval, very smooth and polished, piceo-rufous, 

 the prothorax clearer; head concave, barely perceptibly and sparsely 

 punctulate, the anterior transverse stria entire but, at the sides, 

 separated from the striae along the eyes; pronotum abruptly sparsely 

 but distinctly punctate toward the sides, the lateral stria extremely 

 fine, but at apex curved far inward and wholly disconnected from 

 the marginal stria of the apex; basal margin without trace of punc- 

 tures, the ante-scutellar fovea minute and vestigial; elytra evenly 

 rounded at the sides, much narrowed apically, the striae finely and 

 feebly crenulate, the fourth hooked inward to some extent at base, 

 the outer subhumeral very short, fine, apical and close to the coarse 

 crenate stria of the inflexed sides; mesosternum with the coarse and 

 entire crenate marginal stria arcuate, flexed backward at the sides, 

 the discal transverse stria wholly wanting; propygidium densely and 

 relatively coarsely punctate. Length i.S mm.; width 1.3 mm. 

 Texas (Austin). One specimen geometricus Csy. 



Body broadly, evenly oblong-oval, convex, deep polished black through- 

 out, the legs dull rufous; head flat, feebly concave anteriorly, finely, 

 feebly punctulate, the ocular striae not extending inward anteriorly, 

 the transverse frontal stria wholly wanting; prothorax not quite 

 twice as wide as long, the converging sides gradually more arcuate 

 anteriorly; lateral stria wanting, the marginal very fine, uniting 



