3 



ai'c tninsvcrsc and rcniform ; front pvolono^cd, covering the ];iljrnni, 

 sides dilated and sliyhtly reflexed; snrface i'eel)]y convex at tlie 

 middle, broadly concave each side, transversely imjjressed. witii a small 

 dee}) fovea on the vertex. Antennae with the 3rd joint as long as 

 the two following, 11th slightly narrower than the 10th. Mentnm 

 narrow, ronnded in front, Avith two discoiclal impressions; inner lohe 

 of maxillae with a corneons hook. Prothorax emarginale in front, 

 I'onnded on the sides, then narrowed and sinuate to the basal angles, 

 which are prominent ; disc coarsely and confluently cribrate. with 

 two dee]) oval foveae occn])ying nearly the whole of the median 

 line. Elytra with the suture and four costae each side acutely 

 elevated ; flanks rather widely embracing the abdomen. Prosternum 

 produced and acute behind the coxae: mesosiernum Ijroadly concave. 

 Intercoxal process of 1st ventral segment broader than long, seg- 

 ments 1-3 diminishing in length, 4th short. Under surface s[iarselv 

 and strongly granulate. 



Front thighs armed with a broad tooth ; front tiltiae curved and 

 serrate on the outer edge, aj)ical angle produced. Tarsi setose. 



T. COStatUS, 11- s- Elongate, dirty black, oi)ake. Head and prothorux 

 coarsL'ly, conlluently cribrate, the latter Avith two deep dorsal foveae. 

 Elytra elongate oval, with suture and four discoidal costae acutely 

 elevated, intermediate furrows deep and broad, suln-eticulate. Length 

 1:^.5 mms. 



Kock Creek, Owyhee Co., Idaho. Mr. Chas. Eichtenfeld ; one 

 specimen kindly given me by Mr. Ivciuecke ; others are in the col- 

 lections of Dr. Horn and Mr. Bolter. This may perhai)s be con- 

 sidered as representing in North America the Scolubiua group. 

 A^IBLYCTLS, n. g. [Melandryidae.] 



Head inclined, without frontal suture ; eyes transverse, rcniform, 

 tinely granulated. Antennae longer than half the body, bi-oadly 

 compressed, serrate ; 3d joint as long as 1st and 2nd united, the 

 latter triangular, about {- as long as the 1st, 11th joint longer than 

 wide, outer half suddenly narrower. Palpi, maxillary not as long as 

 the head ; 1st joint small, slender ; 2nd triangular longer than wide; 

 3rd triangular as wide as long, outer apical angle acute, and outer 

 side longest ; 4th oval-siibtriangular, outer side curved, apical angle 

 rounded ; it is not longer and rather narrower than the 3i-d joint ; 

 labial small, cylindrical. Front coxae large, conical, contiguous ; 

 middle coxa? long, contiguous for the posterior half of their length. 

 Tibiae with acute well-develo])ed spurs. Tarsi, front, dilated, 4th 

 joint emarginate ; Middle slender, 1st joint nearly as long as the 3 



