AMERICAN COLEOPTERA. 133 



riorly; labial and maxillary palpi similar, their terminal joints 

 largest, nearly twice as long as wide, fusiform, pointed. Antennae 

 11-jointed, joints 9-11 longer. Eyes moderately prominent, but not 

 large. Prothorax nearly or quite as wide as the elytra, sides mar- 

 gined. Elytra parallel, confusedly punctate. Front coxae moder- 

 ately prominent, distinctly but narrowly separated ; presternum short 

 before them, the intercoxal process becoming wider and ascending 

 posteriorly. Middle coxae moderately separated ; hind coxae sulcate, 

 the coxal plate suddenly and strongly dilated internally. Ventral 

 segments 1 and 2 equal, 3 and 4 equal and slightly shorter, 5 longest. 

 Legs short and thick, the tarsi wide and densely pubescent beneath. 



Four species have been described from our fauna, one of which, 

 elegans, is. so aberrant in several points of structure, notably in 

 antennal formation, that I have thought best to make it the type of 

 a new genus, a procedure indeed, which its author predicted would 

 be found necessary in the event of a revirsion of the Anobiini. 



Our species are thus separated : 



Elytra distinctly granulato-punctate, side margin of prothorax more broadly 



flattened 1. rufovillosum. 



Elytra more finely punctate, the granules very feebly developed 2. affine. 



A careful examination of the type of squalidum shows that it is 

 only a small specimen of rufovillosum, the antennal differences given 

 by LeConte for the separation of the two being almost entirely 

 imaginary. 



1. X. rufovillosum DeG. — Form rather stout, parallel, two and one-half 

 times as long as wide; dark brown, tessellate with short fuscous and fulvous 

 hairs, the darker ones very inconspicuous. Antennae (fig. 18) a little longer than 

 the head and thorax ; first joint stout, oval ; second much narrower and half as 

 long as the first; third to eighth subequal in length and gradually wider, the 

 third fully twice as long as wide, the eighth one-half longer than wide, ninth 

 subtriangular twice as long as the eighth and about one-half wider, tenth similar 

 to the ninth but slightly smaller, eleventh elongate-oval, widest at middle, a 

 little longer than the ninth and more slender. Prothorax two-thirds as long as 

 wide, very obscurely impressed along median line, sides feebly arcuate, margin 

 rather broadly flattened and a little reflexed, front and hind margins arcuate 

 and a little sinuate each side, angles all rounded ; surface as well as that of the 

 head and elytra strongly, rather densely granulate-punctate, the granules becom- 

 ing less strong on the head and toward the elytral apex. Under side sparsely 

 inconspicuously pubescent and rather strongly, closely punctate throughout, the 

 punctures simple and less close on the abdomen, becoming denser on the sterna 

 and parapleurae ; the presternum and mesostemum throughout and the anterior 

 parts of the metasternum strongly granulose. Length 6-7.5 mm. 



TRANS. AM. ENT. SOC. XXXI. APRIL, 1905. 



