570 PROCEEDINGS OF THE NATIONAL MUSEUM Y0U 93 



be true of a series said to have been reared from Tychius lineellus 

 LeConte in the seed heads of Lupinus. 



Distribution. — Arkansas, California, Colorado, Delaware, District 

 of Columbia, Georgia, Illinois, Kansas, Maine, Maryland, Nevada, 

 New Brunswick, Pennsylvania, Texas, Virginia, West Virginia. 



TETRASTICHUS DOLOSUS Gahan 



Tetrastichus dolosus Gahan, Proc. U. S. Nat. Mus., vol. 53, p. 215, 1917. 



Very dark, iridescent blue-green ; head, antennae, coxae, and basal 

 parts of femora brown ; tibiae and tarsi light yellow or white. 



Female. — Length, 1.25-1.35 mm. Antennae inserted at level of ven- 

 tral margins of compound eyes; apex of scape not reaching anterior 

 ocellus ; all f unicle segments equal in length and each as long as pedicel, 

 and as wide as long, club as long as scape ; length of malar space one- 

 half as great as height of compound eye ; postocellar line three times 

 as long as ocellocular. Mesopraescutum as wide as long, surface 

 almost entirely covered with bristles, bare only on meson, so that 

 there are four or five rows of bristles at each lateral margin; sub- 

 marginal vein of forewing with thiee or four dorsal bristles; marginal 

 vein twice as long as stigmal ; apex of hindwing blunt, fringe at pos- 

 terior margin one-quarter width of wing at hamuli. Surface of propo- 

 deum almost smooth, slightly roughened; paraspiracular carinae 

 absent; mesal length of propodeum one-third length of mesoscutellum ; 

 propodeal spiracles separated from anterior margin by a space equal to 

 diameter of a spiracle ; gaster as long as thorax. 



Male. — Length, 1.1 mm. Scape broadened, its darkened anterior 

 carina three-eighths as long as scape, pedicel and all funicle segments 

 equal in length, funicle segments nearly quadrate and without long 

 setae, club as long as three funicle segments. 



Type locality. — Tallulah, La. 



Types.— U.S.N.M. No. 20395. 



Hosts. — Euplectrus comstockii Howard parasitic on Oaradrina sp. ; 

 Euplectrus sp. parasitic on larvae of the spring cankerworm, Palea- 

 crita vernata (Peck) ; Euplectrus plathypenae Howard parasitic on 

 larvae of the green clover worm, Plathypena scabra (Fabricius) and 

 other Lepidoptera. Specimens were also reared, possibly as primary 

 parasites, from the strawberry leaf roller, Ancylis comptana (Froe- 

 lich), and Fascista cercerisella (Chambers). 



Distribution. — Kansas, Louisiana. 



TETRASTICHUS STROBILUS, new species 



Head and thorax black, with strong iridescent bluish luster ; antennal 

 flagellum, area of head around mouthparts, metanotum, small area at 



