1892 THE BUTTERFLIES OF NEW ENGLAND. 



short but transverse; mesonotum densely minutely punctate, and with deep sulci, con- 

 tinuous -with the lines of the scutellum; scutellum depressed, with dorsal lines 

 slightly converging towards apex ; postscutellum large ; metauotum not short, median 

 carina distinct ; costal cell of fore wings moderately broad, submargiual vein with five 

 to sis bristles. Abdomen subsessile, ovate, depressed above, hardly convex below. 

 Mesopleura well separated, smooth. Posterior tibiae l-spurred, coxae granulate 

 externally. Body usually metallic and with pale markings. 



Cirrospilus niger sp. nov. 



Female. — Shiuiug blacls, with black bristles. Antennae yellowish below; all legs, 

 including coxae, honey-yellow; abdomen yellowish below at base. Posterior border 

 of pronotum perfectly smooth ; anterior border of pronotum, all of mesoscutum and 

 scutellum finely shagreened ; metanotum without sculpture, with a very fine median, 

 longitudinal suture through its anterior portion, and a corresponding carina through 

 its posterior portion; spiracles of this segment perfectly round, prominent, lateral 

 fringe of hairs white and strong. Abdomen lozenge-shape or nearly round, as broad 

 as thoi-ax, but much shorter. Length, 1.5 mm. ; expanse, 3.25 mm. ; greatestwidth of 

 fore wing, .58 mm. 



Male. — Difiers from female in following respects : Abdomen long oval, considerably 

 narrower in front, nearly as long as thorax and quite as wide, the first segment above 

 bearing a large, light-brown, circular spot ; all coxae shining black ; hind femora black 

 above, this color extending downwards at middle ; front femora slightly dusky towards 

 base above. Length, 1.6 mm.; expanse, 3.25 mm. ; greatestwidth of fore wing, .49 

 mm. 



A large number of both sexes of this species were reared by Mr. Scudder 

 from the "tomb-stone" pupae of some um-eared Eulophus, which had 

 previously destroyed the half grown larva of Vanessa atalanta. It is, 

 therefore, a hyperparasite. 



Genus TETRASTICHUS Haliday. 



Head with a distinct genal sulcus ; clypeus bidentate at middle of apex ; ocelli 

 usually placed in a curved line ; eyes smooth or rarely pilose, ovate or subrotund ; 

 vertex narrow; impressed line before the ocelli usually distinct; antennae usually 

 inserted a trifle below tlie middle of the face ; scape very rarely reaching above the ocelli ; 

 ring-joint very small but easily seeu, rarely conforming with the joints of the funicle; 

 funicle 3-jointed; club 3-jointed, the last joint smaller, often setigerous. Pronotum 

 with the posterior border, especially on the sides, hairy. Mesoscutellum with four 

 bristles behind the middle, usually with two parallel, longitudinal, deeply impressed 

 lines. Metauotum usually short, rarely punctulate; apex in the middle not produced, 

 but angularly emargiuate ; often carinate ; fimbriate border M'ith 1 to 4 bristles. TVings 

 clear; costa longer than marginal; no postmarginal ; stigmal quite long, club distinct, 

 uncus conspicuous ; submarginal with 1 to 5 bristles. Abdomen ovate or couico-tri- 

 angular; terebra rarely much exserted. Posterior tibiae l-spurred, tarsi shorter than 

 tibiae with joints subequal in length. Male antennae rarely with erect hairs, usually 

 with long appressed hairs ; ring-joint always distinct, usually transverse (adapted from 

 Thomson). 



Table of Species. 



Mesoscutum with an impressed, median, longitudinal line. 



Antennae inserted just above clypeus semideae. 



Antennae inserted considerably above clypeus. 



Wing veins pale saiindersii. 



Wing veins dark theclae. 



Mesoscutum with no impressed line niodestus. 



