248 MEMOIRS ON THE COLEOPTERA 



Form narrower than in congener, the size rather smaller, somewhat more 

 convex, highly polished in lustre, dark testaceous, the head piceous 

 except at base; prothorax not clouded; elytra black, rather broadly 

 testaceous laterally and basally and with a fine, feebly rufescent 

 suture; under surface, legs and epipleura as in congener; head similar, 

 except that the antennae are not quite so long, more slender and with 

 evidently shorter joints; prothorax much shorter, more convex, less 

 evenly rounded at the sides, widest near apical third, where the 

 sides are rather strongly rounded, converging and feebly arcuate pos- 

 teriorly to the angles, which are obtuse, clearly defined though not 

 at all prominent; posterior fourth of the surface, between the foveae, 

 depressed below the general level, the foveae deep but rather narrow, 

 finely punctate; elytra nearly as in congener but shorter; anterior 

 tarsi (a 71 ) distinctly dilated, with joints 2-4 transverse, 1-4 with the 

 usual long and pointed, narrowly separated, upwardly oblique, 

 diverging and narrowly separated hyaline plates, two to each seg- 

 ment, in chevron formation, the plates feebly crumpled transversely 

 and also with fine broken longitudinal strigilation; hind tarsi slender, 

 of the usual structure. Length (c?) 3-75 mm.; width 1.02 mm. 

 California (San Diego). A single example, taken by the writer. 



aridus n. sp. 



Form narrower, the size still smaller, rather more depressed, blackish- 

 piceous, the base of the head and base, sides and suture of the elytra 

 rufescent; under surface piceo-testaceous throughout, the legs and 

 epipleura paler, yellow; head almost four-fifths as wide as the prrtho- 

 rax, with well developed and prominent eyes; antennas dusky, pale 

 basally, rather short and slender, extending but little behind the 

 thoracic base; prothorax barely a fourth wider than long, widest 

 near apical third, where the sides. are rather strongly arcuate, thence 

 converging, becoming almost straight to the obtuse basal angles, 

 which are sharp and feebly prominent; base fully as wide as the 

 truncate apex, wholly unmargined as usual; surface with rather strong 

 sparse punctures in the vaguely but distinctly impressed latero- 

 basal regions; anterior and posterior transverse impressions slightly 

 evident; elytra one-half longer than wide, nearly one-half wider than 

 the prothorax, the striae fine, moderately strong; intervals flat 

 laterally and apically, feebly convex suturally; side margins very 

 finely reflexed as usual and with three or four erect setae basally, the 

 thoracic marginal seta, behind apical fourth, long and strong; hind 

 tarsi very slender, three-fifths as long as the tibiae. Length ( 9 ) 3- 

 mm.; width 1.05 mm. Arizona (Tugson). A single example, 

 taken by the writer decorus n. sp. 



12 Body elongate, moderately convex, shining, pale, the head infumate; 

 elytra with a piceous cloud behind the middle and divided by the 

 pale suture, the under surface of the hind body and median part 

 of the prosternum blackish when mature; head as in congener but 

 shorter and with a shorter neck, the antennae similar but not so 

 elongate, the joints shorter; prothorax similar and with obtuse, clearly 

 marked though not in the least prominent, basal angles, but more 

 evenly rounded at the sides and with the median parts of the base 



