42 Illinois State Lahoratorij of Xatural History. 



fourth, and fifth lighter than the rest. Wings hyaline; nerv- 

 ures and stigma brownish black, paler at base; areolet moderate, 

 sessile, sub-rhomboidal. Scutum and scutellum of mesothorax 

 pubescent, shining, with numerous shallow punctures; scutum 

 with two oblique impressed lines arising anteriorly on each side 

 of the middle and meeting on the upper surface. Scutellum of 

 the metathorax canaliculate. First joint of abdomen shining, 

 with a prominent ridge arising anteriorly on each side of the 

 middle and running obliquely back; between these ridges in 

 front the segment is excavated and the sides are also somewhat 

 hollowed out. Remaining segments punctate, pubescent. 



Described from one specimen bred from Teras miniita in 

 June. 



This is a well-marked species, easily distinguished from 

 those previously described. 



Cremastus forbesi, sp. n. 



Cocoon. — Length 6 mm. Thin, whitish, sub-cylindrical. 



Imago, 9 — Length 7 mm. Black; eye orbits, mouth 

 parts, ventrum of abdomen, and two anterior pairs of legs, 

 honey-yellow; posterior legs approaching a chestnut color, 

 with tips of tibiae dusky; tarsi dusky, especially at the tips; 

 posterior margin of abdominal terga (except first) dusky yel- 

 low. Antennse 5 mm. long, setaceous, ventral surface nearly 

 tawny olive. Scutum of mesothorax punctate, with a faint 

 impressed line starting a short distance each side of the middle 

 of the anterior margin, and running slightly obliquely to the 

 posterior margin, being united on the medio-dorsal portion of 

 the scutum by a broad, flattened, thickly punctured area. Scu- 

 tellum of mesothorax punctate, having (in the specimen at 

 hand) an indistinct, transverse, chestnut-colored band. Meta- 

 thorax strongly sculptured; a well-developed longitudinal 

 carina on each side of the dorso-meson, arising near the an- 

 terior margin, and running to posterior margin, the two being 

 connected anteriorly by a transverse carina; on the outside of 

 each of these runs another longitudinal carina, the latter being 

 connected with the former by transverse carina?, so as to en- 

 close a quadrilateral area on the dorso-lateral angles of the 



