318 GEO. H. HORN, M. D. 



arcuate, hind angles rectangular. Scutellum large, moderately densely punc- 

 tate. Elytra as wide as long, disc with seven rows of moderately coarse punc- 

 tures, the intervals irregularly punctate. Body beneath sparsely punctate. 

 Legs black, tarsi paler. Length .16 — .18 inch; 4 — 4.5 mm. 



This insect at first sight resembles a Hjjpcraspis. The elytra should 

 have ten rows of punctures, but the first and the outer two are entirely 

 obsolete and replaced by the confused punctures. 



Occurs in Massachusetts. 



PALINODES Erichs. 



Mandibles bifid at tip. Prosternum slightly prolonged not dilated 

 at tip. Mesosternum not carinate, middle coxae not widely separated. 

 Anterior and naiddle tarsi dilated, posterior slender as long as the 

 tibiae. Outer apical angle of tibiae obtusely rounded. 



The males have an extremely short additional segment. 



The characters other than those given above are the same as in 

 the preceding genus. 



One species is known to me. 



P. silacens Erichs. — Oval, convex, pale piceo-testaceous, glabrous, shin- 

 ing, elytra iridescent. Head sparsely punctate. Thorax very sparsely and 

 finely punctate, more than twice as wide as long, much narrowed in front, 

 apex emarginate, base feebly arcuate, at middle a very short, truncate scutellar 

 lobe, sides arcuate, hind angles rectangular. Scutellum large, sparsely punc- 

 tate. Elytra longer than wide, narrower toward apex, slightly broader behind 

 the humeri, disc with nine ro\fs of moderate punctures the sutural deeply 

 impressed, intervals with a single series of very fine punctures. Body be- 

 neath smooth. Length .12 — .16 inch; 3 — 4 mm. 



The elytra are sometimes darker externally near the tip. The 

 tibial spurs on the anterior two pairs of feet are very small, those 

 on the posterior very long. 



Occurs in the Middle and Southern Atlantic region. 



CYCHRAIttUS Kug. 



Labrum feebly emarginate. Mandibles simple at tip. Antennal 

 grooves short, convergent. Prosternum vertical behind the coxae the 

 tip not prolonged. Mesosternum vertical, not carinate, the middle 

 coxae not very widely separated. Thorax not lobed at middle of base. 

 Scutellum not large. Tarsi all dilated. 



The males have a small additional segment. 



This genus is allied to AmjihicTossus in form and pubescent surface, 

 but diflfers in the bilobed labrum, the form of mesosternum and the 

 tarsi. In the present genus the mesosternum is narrow and oblique, 

 the metasternum flexed upwards at tip between the coxae and not 

 protuberant. 



