l"»r) NORTH AMERICAN 



as the contiguous elytra; sides very feebly divergent to the fourth and fifth 

 segments which are equal in width and but slightly wider than the first; 

 border erect, very strong toward the base, gradually becoming narrower to 

 the tip of the sixth where it vanishes ; Surface dejtressed, impunctate, not 

 reticulated, very highly polislied. Legs rather short ; tarsi extremely slen- 

 der, third joint of the posterior more than twice as long as the two preceding 

 together ; claws very long. 



Mule. — Characters nearly as in hirolnr, except that the eighth segment is 

 more deeply and broadly impressed, and the arching laminae of the seventh 

 nearly meet posteriorly. 



Female. — Sexual characters nearly as in hicolor. 



Length 2.7-2.9 mm. 



Southern States (locality unknown), 1; Capfon and Enterprise, 

 Florida, 2. 



The two Floridan specimens are females, and there are certain 

 differences to be observed between them and the above-described 

 tyi)e, viz. : the head is distinctly wider than the pronotum, the elytra 

 are slightly longer, and the antennae have the terminal joint paler. 

 As the first of these characters usually belongs to the male, the pro- 

 priety of placing the specimens with tiiis species may be question- 

 able, but in the absence of the male it would be useless to attempt a 

 description. 



Longicornis Sachse appears to be identical with this species, the 

 type in Dr. LeConte's cabinet has the terminal joint of the antennae 

 slightly paler, the size is somewhat larger, the colors darker, and the 

 laminae of the seventh ventral segment much more widely separated. 



3. A. crassicorilis n. sp. — Form slightly more robust than in sphrtri- 

 collis. Pubescence of abdomen fine, sub-recumbent and rather plentiful 

 especially beneath, elsewhere rather sparse with a few rigid setae on the 

 liead and along the Hanks of the pronotum, but not on the elytra. Color of 

 head nearly black ; prothorax dark fusco-testaceous ; elytra rather paler, 

 pieeo-testaceous ; abdomen piceous-black above, scarcely paler beneath ; 

 antennae testaceous at the base, l)lackisli toward the tip, outer half of 

 terminal joint very slightly paler ; legs very p\le testaceous, upper surface 

 of ftuiora rather abruptly castaneous in the outer third. Head moderate, 

 depressed ; eyes small, rather prominent; sides behind them very feebly con- 

 vergent and arcuate ; broadly truncate behind ; interocular surface polislied, 

 impunctate, minutely and conspicuously rugulose near the anteunal tuber- 

 culations ; the latter very prominent, parallel, gradually becoming extinct 

 jHtsteriorly, anterior tips slightly paler ; antennae twice as long as the head, 

 penultimate joints slightly longer than wide but more than twice as robust 

 as the second, second much shorter than the third, longer than the fourth. 

 Prothorax robust ; sides parallel and feebly arcuate ; widest in the middle 

 where it is slightly wider than long; anterior and posterior angles equally 

 and strongly rounded ; base truncate iu the middle, apex broadly and rather 



