Horn.] DIROTOGNATHINI. 79 



T. asperatus Boh. Sch. Gen. Cure. i^, 1, p. 116. ^y/J 



Form oval, moderfitely robust, densely covered with a pale ochreous^ " 

 * coating indistinctly scalj', variegated on the elytra with brownish spots. 

 Head and rostrum slightly longer than the thorax, the rostrum with M deep, 

 broad, transverse impression at base beneath which the rostrum is strongly 

 convex, surfiice densely coated, and with clavate scale-like liairs sparsely 

 placed. Thorax transversely oval, nearly twice as long as wide, apex 

 truncate, base feebly arcuate, sides strongly arcuate and very slight]}^ con- 

 stricted near the tip ; surface moderately convex (sculpture indistinct) 

 densely covered with pale brownish coating, median line and sides paler, 

 and with sparsely placed erect, scale-like clavate hairs. Elytra oval, sides 

 very feebly arcuate, apex obtuse, base feebly emarginate, humeri sliglitly 

 oblique, surface distinctly striate, intervals flat, densely covered with pale 

 ochreous coating variegated with brownish spots and with the clavate scale- 

 like hairs arranged uniseriately on the intervals. Body beneath and legs 

 densely coated, the latter with short bristly hairs. Length .12 inch ; B mm. 

 One specimen from the Middle States . 



Tribe IV. DIROrOUNATHINf . 



Rostrum longer than the head, slightly flattened. Mandibles rather 

 prominent. Mentum very small, trapezoidal, not retracted, maxillae and 

 ligula entirely exposed. Thorax with feeble ocular lobes. Metasternal 

 side pieces narrow connate with the sternum, "with very slight traces of 

 suture. 



These few characters serve to distinguish this tribe as represented in our 

 fauna, to which may be added : Mandibles prominent, laminiform at tip, 

 inner edge strongly bi-dentate, outer edge arcuate, with a groove and a scar- 

 like space near the base, apex truncate, scar terminal, small, very narrow 

 and transverse, deciduous pieces short, broader at tip and obliquely trun- 

 cate. Mentum very small, supported by a distinct peduncle which is rather 

 short. Metasternum rather short. 



I am entirely unable to place this tribe in or near any of those indicated 

 by Lacordaire, further than to state that it is PhancrognatJi Synmeride and 

 belongs to the first section of the latter Phalanx, 



One genus occurs in our fauna. 



DIROTOGNATHUS n. g. 



Rostrum longer than the head, slightly broader in front and somewhat , 

 flattened, straight, tip truncate. Scrobcs lateral feebly arcuate, very indis- 

 tinctly defined, rapidly Avider and evanescent. Antenna; moderate, scape 

 gradually thicker, attaining the posterior margin of the eyes, funicle 7- 

 jointed, first two joints longer, the first longer than the second, 3-7 short 

 broader than long, sub-moniliform, club elongate oval. Eyes broadly oval, 

 coarsely granulated. Thorax Avith distinct but feeble ocular lobes Avhich 

 are fimbriate. Scutellum invisible. Elytra oval, base feebly emarginate. 

 Metasternum short, side pieces narroAV, connate, with scarcely any traces of 



