550 PROCEEDINGS OF THE NATIONIAX, MUSEUM vol. 93 



Host. — The sinuate pear tree borer, Agrilus sinuatm Olivier. 

 Distribution. — New York. 



TETRASTICHUS SCRIPTUS, new species 



Dark, iridescent green, with antennal pedicel and flagellum, coxae, 

 basal two-thirds of femora, and apical segment of each tarsus brown ; 

 antennal scape, trochanters, apices of femora, tibiae, and basal seg- 

 ments of tarsi light yellow. 



Female. — Length, 1.4-1.8 mm. Antennae inserted slightly dorsad 

 of level of ventral margins of compound eyes ; apex of scape reaching 

 level of vertex; pedicel slightly more than one-half as long as first 

 funicle segment, first and second segments equal in length, third 

 slightly shorter than second, club as long as second and third com- 

 bined; length of malar space two-thirds as great as height of com- 

 pound eye, postocellar line one and one-half times as long as ocellocu- 

 lar. Mesopraescutam bearing one row of bristles at each lateral 

 margin; submarginal vein of forewing with one dorsal bristle; apex 

 of hindwing blunt, fringe at posterior margin one-third as wide as 

 wing at hamuli ; thoracic pleuron and bases of metacoxae shagreened. 

 Surface of propodeum shagreened, strong median, paraspiracular, 

 and oblique carinae present ; mesal length of propodeum two-fifths as 

 great as length of mesoscutellum ; spiracles separated from anterior 

 margin of propodeum by a space one-half as great as length of a 

 spiracle; gaster longer than thorax, provided with rather incon- 

 spicuous setae on sides and venter. 



Male. — Unknown. 



Type locality. — Irvington, N. J. 



Types.— U.S.N.M. No. 56244. 



Described from the female holotype and four female paratypes 

 reared from a primary parasite {Euplectrus sp.?) parasitic on the 

 cottonwood leaf beetle, Lina scripta (Fabricius), by E. L. Dickerson 

 in July. 



TETRASTICHUS PRODUCTUS Riley 



Tetrastichus product us Riley, Proc. U. S. Nat. Mus., vol. 8, p. 419, 1885— Gahan, 

 U. S. Dept. Agr. Misc. Publ. 174, p. 143, 1933 (this paper contains a bibliog- 

 raphy complete through 1932). 



Very dark brown, almost black, with iridescent green reflections; 

 trochanters, tibiae, and tarsi white; antennae sometimes tan or yellow ; 

 mesal lobe of metanotum yellow. 



Female. — Length, 2.0 mm. Antennae inserted at level of ventral 

 margins of compound eyes; apex of scape not quite reaching level of 

 anterior ocellus, first funicle segment slightly longer than second, 

 second and third segments equal in length, club as long as last two 

 funicle segments combined ; length of malar space height of compound 



