SUBFAMILY II. — ASOPIN^. 203 



margins almost straight, their edges obtuse, humeri narrowly 

 rounded, not prominent ; scutellum relatively small, its apical 

 third strongly tapering, much narrower than corium, the tip 

 narrowly rounded, male, almost as wide as corium, the tip 

 broadly rounded, female ; membrane surpassing abdomen, its 

 veins simple ; connexivum narrowly or not at all exposed ; 

 osteolar canal very narrow, curved, lying close to the front 

 edge of the metasternal plate ; front femora and second ventral 

 unarmed; tibiae not sulcate, tarsi 3-jointed. Males without 

 a pubescent spot on ventrals 4 — 6; their genital plate semi- 

 circular, its hind margin reflexed, broadly concave. 



Two species are known, one inhabiting Europe, the other 

 Canada and the United States. 



146 ( — ). ZlCRONA CUPREA Dallas, 1851, 108. 



Oblong-oval, subconvex. Above dark purplish-blue, shining, the 

 pronotum and scutellum varying to dark greenish-blue ; antennae and 

 membrane of elytra fuscous-black; under surface purplish to greenish- 

 blue; legs and beak black, the tarsi fuscous. Entire upper surface 

 finely, sparsely but very evidently punctate. Basal half of scutellum 

 with numerous fine transverse wrinkles between the punctures. Under 

 surface minutely and sparsely punctate. Other structural characters 

 as above given. Length, 7 — 9 mm. ; width, 3.5 — 4 mm. 



Gila River, New Mexico, July (Gerhard). Texas (Osboni) . 

 The types of Dallas were from Hudson's Bay, and it is known 

 from Maine, New Hampshire and Michigan, west to British 

 Columbia, California and Arizona, but in the east not south of 

 latitude 42 degrees. It occurs for the most part in high 

 altitudes, the New Hampshire specimens being taken on the 

 summit of Mt. Washington. 



Although Uhler (1872, 395) said that he could find no suf- 

 cient differences to separate the American form from the 

 European Z. ccerulea (Linn.), he continued to treat the former 

 as distinct in all his subsequent writings. In this he has been 

 followed by almost all American writers except Van Duzee. A 

 comparison of Arizona and Texas specimens with some of 

 typical Z. ccerulea from Bucharest, shows the latter to be wholly 

 greenish-blue in hue, with the upper surface distinctly 

 smoother, the punctures sparser and more shallow and the 

 scutellum wholly devoid of the transverse wrinkles found in 

 the American form. I have therefore retained the name of 

 Dallas for our species. 



