348 COLEOPTERA OP NORTH AMERICA. 



deeply emarginate; less coarsely granulated and divided in 

 Dysphaga; the front short and perpendicular, labrum obsolete, or 

 connate ; mandibles short, but very stout at base, and trigonal ; 

 palpi unequal, short, and cylindrical, the labial nearly pointed, 

 the maxillary truncate, with a terminal oval cicatrix or mammilla 

 representing the last joint in Methia ; still more feeble and nearly 

 atrophied in Dysphaga. The presternum is elongate in front of 

 the coxae, which are conical and prominent; the cavities are 

 confluent, separated behind by a very narrow point of presternum, 

 widely angulated externally and open behind. Middle coxae 

 conical, prominent, contiguous, cavities confluent, widely open 

 externally ; hind coxae nearly contiguous, also prominent. 

 Ventral segments equal in length, cylindrical in Styloxus, with 

 the 5th broadly emarginate, and 6th visible; of softer consistence, 

 5th longer with a large hairy vulva-like excavation in three {%) 

 specimens of Methia before me; flat with the segments imbricate 

 at the sides (as in Lampyridag) in Dysphaga, 5th joint deeply 

 emarginate in 9 , longer in % , with the same vulva-like excavation 

 as in Methia, but broader and patulous, eo as to become trian- 

 gular ; the abdomen is black in 9 but yellow in % of Dysphaga. 



The legs are moderate in Styloxus, with the thighs clavate; 

 more slender, with the thighs not clavate in Methia ; very feeble 

 in Dysphaga ; the tarsi are short, and the last joint is as long, or 

 nearly so, as the others united ; the claws are small and divaricate. 



The antennae are longer than the body in both sexes ; pilose 

 in Methia, sparsely ciliate in the other two genera. The scape 

 is short in Styloxus and Dysphaga, and is armed at tip with a 

 stout spine in the former ; it is longer and more slender in Me- 

 thia; the 2d joint is distinct in Styloxus, but obsolete in Methia 

 and Dysphaga, so that only ten joints are visible. 



Methia pusilla Newman, occurs in the Southern States; Dys- 

 phaga tenuipes {% ventralis) Hald., in Pennsylvania, in hickory 

 twigs, D. Isevis Lee, in Illinois; they are similar in size and 

 form, but the prothorax is coarsely and densely punctured in D. 

 tenuipes, while it is shining and only sparsely punctured in D. 

 Isevis. 



Styloxus is founded on a species from Lower California, some- 

 what larger than Methia pusilla, but also of a uniform brown 

 color. I have named it S. lucanus. 



