160 ACADEMY OF NATURAL SCIENCES 



PYTHO Latr. 



P. PALLIDA. — Thorax with two impressed lines at base ; cly- 

 peus emarginate before. 



Inhabits Arkansa. 



Body pale reddish-brown, very much depressed, flat above, 

 minutely punctured : clypeus on the anterior edge concave, the 

 angles acute, (more prominent in one sex :) thorax, anterior edge 

 very concave : anterior angles obtusely rounded ; posterior edge 

 perfectly rectilinear j posterior angles acute ; base with two im- 

 pressed lines abbreviated before : elytra with punctured striae, 

 lateral edge slightly elevated. 



Length one-fifth of an inch nearly. 



This curious species was found on the banks of the river Ar- 

 kansa by Mr. Thomas Nuttall. 



It is found in various parts of the United Satea. 



[Belongs to the genus Adcllna Bej., of which, however, I have 

 not yet seen any description. — Leg.] 



tKBEMERA Latr. 



1. (E. RTJFICOLLIS. — Black; thorax rufous, with two pro- 

 foundly indented spots. [272] 



Inhabits the United States. 



Necydalh ruficollis Knoch in Melsh. Catal. 



Body black, with minute hairs : mouth, excepting the palpi, 

 somewhat piceous ; beneath yellow : thorax rufous, narrowed be- 

 hind : two profoundly indented spots placed one each side of the 

 base, a less profoundly indented one at base : elytra purple-black, 

 minutely granulated ; three remote elevated lines. 



Length one-fourth of an inch. 



Found specimens on the Missouri and near the Rocky Moun- 

 tains. Mr. Nuttall also obtained them on the Arkansa. 



[Belongs to Asclera ; afterwards described as Iclmomera cari- 

 nata Newman, Ent. Mag., 5, 378 Lec] 



2. (^. FRAXINI. — Black : thorax rufous, longitudinally ob- 

 long, narrowed behind. 



Inhabits the United States. 

 Necydalis fraxinil)'le\ii\i. Catal. 



Body blackish-brown, with minute hairs : mouth piceous an- 

 1824.] 



