AMERICAN COLEOPTERA. 17 



This species has nothing to do with pnlrhelln and mixta with 

 which it has been placed in synonymy by Mr. Crotch and Mr. Edw. 

 Saunders who acted probably under advices from Mr, C. (see Cata- 

 logue Buprest. Loudon, 1871). 



A. niillia. Gory.— (PI. I, fig. 20.) Form robust, black, surface with very- 

 feeble bronze lustre, and with few erect black hairs, sides of thorax yellow, 

 elytra with lateral and subtnedian stripe extending three-fourths to tip and 

 united by several transverse bands, posteriorly two narrower transverse bauds. 

 Head coarsely and densely punctured, front feebly impressed, vertex without 

 carina. Thorax more than twice as wide as long, apex emarginate base trun- 

 cate, sides moderately arcuate and gradually wider from apex to base, margin 

 narrow but visible from above; disc with shallow median triangular impression 

 and a moderate oblique impression on each side; surface not coarsely and 

 rather sparsely punctured at middle, more densely toward the sides. Elytra 

 as wide as thorax, sides subparallel 9 or ffradually % narrowed from base, 

 apical third arcuately narrowed to tip; disc striate at the sides and tip, sffc 

 middle iienr the base feebly, with rows of moderately coarse punctures, inter- 

 vals flat, uniseriately punctulate. Body beneath dark bronze, sometimes feebly 

 violet, sparsely pubescent. Prosternum as in connexa. Abdomen very sjiarsely 

 punctate, last ventral with distinct double ajaical margin. Length .38 — .44 

 inch ; 9.5 — 11 mm. 



This species preserves its type of marking with as great uuiformity 

 as any species in our fauua. 



Occurs iu Texas also in Mexico. 



AC.M.EODER/E TRUNCAT.^. 



In these species the anterior margin of the thorax forms a contiuii- 

 ous line, the upper margin being truncate or very feebly eujarginate. 

 The alae of the prosternum attain the anterior angles of the thorax 

 beneath. The head is inserted merely to the hind margin of tlie eyes. 

 The species are all of rather robust facies, form cyl.ndrical and convex 

 above. Many of the species are of small size. 



They are distinguished as filluws: 



Antennae with fifth joint suddenly broader than the fourth which is cylin- 

 drical 1. 



Antennae gradually broader troin the tliird joint, fourth joint oval and similar 



to the fifth 9. 



1. — Last ventral with subafiical carina more or less distinct 2. 



Last ventral without trace of subapical carina; form cylindrical 7. 



2. — Thorax margined with yellow at the sides .". 



Thorax without yellow margin 4. 



3. — Thorax arcuately narrowing from base to apex; strise of the elylral disc 



finely punctured pulchella. 



Thorax wider at middle than the elytra at base, sides strongly arcuate; 

 strite of disc coarsely punctured obtlisa. 



TRANS. AMER. ENT. SOC. VII. (3) JANUAUV, 1878. 



