206 H. C. FALL. 



1IEGORAIHA new genus. 

 Form robust, cylindric oval, terminal joint of maxillary palpi a 

 little elongate, obliquely truncate, the inner angle broadly rounded ; 

 terminal joint of labial palpi similar but a little wider. Antennae 

 11 -join ted, stem not serrate, three outer joints enlarged, varying in 

 form sexually and specifically. Eyes nearly as small in the female 

 as in Xyletinus, obviously larger in the male ; front strongly acutely 

 margined over the antennae ; epistomal suture arcuate, not impressed 

 and indistinct. Prothorax transverse, disk broadly but obviously 

 gibbous posteriorly when viewed in profile (feebly so in ingens) ; 

 front angles right or a little acute, hind angles broadly rounded, 

 side margin narrowly reflexed in front becoming somewhat wider 

 posteriorly. Elytra confusedly punctate, not striate. Head deeply 

 excavate beneath for the antennae; front and middle coxae contigu- 

 ous; metasternum declivous anteriorly from side to side, the de- 

 clivity not margined posteriorly, except at the middle in simplex; 

 episterna broadly exposed, wider and declivous in front ; hind coxal 

 plates feebly dilated internally ; first, third and fourth ventral seg- 

 ments subequal, second a little longer, fifth still longer ; sutures 

 nearly equally strong, but the first segment as usual lacks the short 

 marginal fringe, which protects the connecting membrane in the 

 other sutures, indicating that the first two segments are really more 

 or less connate. Legs moderately stout, all the tibiae grooved exter- 

 nally ; basal joint of tarsi equal to the next two ; the second equal 

 to the two following ; terminal joint about as long as the second. 



Pubescence of upper surface entirely recumbent; protboracic disk granulate at 



middle, elsewhere simply punctate. 



Anterior declivity of metasternum limited posteriorly by a raised line which 



is distinct at middle but becomes obsolete externally- • -1. simplex. 



Anterior declivity of metasternum not limited posteriorly by a raised line. 



First ventral segment not carinate at middle; antennal club pectinate in the 



male 2. frontalis. 



First ventral segment acutely longitudinally carinate at middle (male not 



known) 3. viriuuin. 



Pubescence of upper surface intermixed with short erect hairs; prothorax gran- 

 ulate over nearly its entire surface 4. ingens. 



1. !tl. simplex Lee. — Elongate oval, convex, blackish brown, with fine 

 sericeous yellowish gray pubescence, which is uniformly recumbent. Antenna? 

 in the male with the first joint curved and moderately dilated, the second longer 

 and thicker than the third ; third to eighth equal in thickness, the third longer, 

 the others about as long as their width ; ninth and tenth large, compressed, tri- 



