32 GPJO. H. HORN, M. D. 



Systematically, the species has been unfortunate. By Zininier- 

 inann it was placed in his ninth group. Later it was considered to 

 he a true Amara, and placed near hasillaris by LeConte (Proc. Acad. 

 1855, p. 351). Putzeys restored it to its original position. It is 

 evident that neither he nor Zimmerinann ever carefully examined a 

 male, or it would have been placed in the sixth group, which, for 

 convenience, has been divided by me in the present essay. 



Specimens are known to me from Massachusetts, New York, Dis- 

 trict of Columbia, North Carolina, Georgia, Texas, Michigan, Wis- 

 consin, Nebraska and Colorado. 



A. robnstulit ii. sp.— Form rather broadly oval and robust, piceous-blaek, 

 with slight greenish bronze surface lustre, legs piceous, the tibije and tarsi 

 slightly paler. Antennse brownish, paler at base. Head slightly wrinkled, the 

 frontal impressions deep but short, a slight depression at middle of frontal suture. 

 Thorax very nearly twice as wide at base as long at middle, slightly wider in 

 front of base, very little narrowed in front, apex very feebly emarginate, sides 

 regularly arcuate, hind angles rectangular, disc convex, without lateral depres- 

 sion, surface obsoletely punctate near apex, in front of the anterior transverse 

 line, base bi-impressed each side, the inner impression larger, the entire basal 

 region indistinctly punctate. Elytra a little wider at base than the base of the 

 thorax, sides moderately broadly arcuate, moderately deeply striate, strise punc- 

 tate, intervals slightly convex, the surface minutely alutaceous. Body beneath 

 l)iceous-black, smooth, shining. Length .30 inch. ; 7.5 mm. 



The scutellar stria is very long and deep, free at its apical end. 

 The ocellate punctures are large and deep, the series widely inter- 

 rupted at middle. 



In the male the middle tibi.'e are slightly arcuate, the posterior 

 slightly sinuate on the inner side. The punctures of the prosternuni 

 are grouped in a shallow, oblong fovea. 



This species is the most broadly oval of any known to me in the 

 Celia series. The grouping of the prosternal punctures suggests that 

 the species might be placed in the mlifovmca group, but the facies is 

 so unlike that species and so niuch more closejy resembling chalcea, 

 that it is placed in this group. 



From the fact that the male elytra are slightly alutaceous, it is 

 probable that the female is more opaque. 



Easily known from chalcea, which alone it in any way resembles, 

 by its broader and more robust form, piceous legs and deeper and 

 longer scutellar stria. 



One male, California; locality unknown. 



