174 ACADEMY OF NATURAL SCIENCES 



band rather behind the middle, abbreviated each side: tip a little 

 prominent, acute : thighs mutic ; a black, longitudinal, impressed 

 line beneath the head. 



Length three-tenths of an inch. 



The dusky band of the elytra has a jagged anterior and pos- 

 terior outline. 



[This is the type of BrachynlijJus. — Leg.] 



2. C AURTCEPHALUS. — Dull green J head and anterior side of 

 the feet golden. 



Inhabits Mississippi. 



Body covered with minute scales : head golden-cupreous ; 

 [311] an impressed line and obsolete abbreviated one each side : 

 thorax green, depressed above, and obliquely depressed each side : 

 elytra green, with regular series of punctures ; interstitial lines 

 minutely punctured ; three alternate ones elevated : beneath 

 green : anterior tibia, and intermediate and posterior pairs of feet 

 on the anterior side golden-cupreous. 



Length (total) half an inch. 



A very fine species. Mr. Nuttall bi'ought a specimen from 

 Missouri ? and I obtained one on the Mississippi river above 

 Natchez. 



[^This is Platyoimts auriceps Sch. — Leg.] 



R[II]YNCH.EXUS Fab. 



1. R. CAUDATUS. — Imbricate, dusky -cinereous, tinged with 

 golden J elytra caudate. 



Inhabits Missouri. 



Body dusky-cinereous, covered with minute scales, and obso- 

 letely tinged with golden, a paler lateral vitta : head obscurely 

 golden : eyes deep black : rostrum with a slightly elevated line : 

 beneath deep black : antenn39 blackish-brown ; thorax obscurely 

 golden, with minute, elevated, black dots : scutel golden : elytra 

 with regular series of punctures; golden color more obscure than 

 that of the thorax ; tip of each, elongated into an obtuse caudi- 

 form projection : beneath obscurely golden, varied with black : 

 feet fuscous, with short hair; [312] thighs dilated before the 

 tip ; a cinereous fascia on the two posterior pairs. 



Length, from the anterior part of the head to the tip of the 

 elytra 1 processes, rather more than two-fifths of an inch. 



[Vol.*llI. 



