566 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



Hosts. — Oak-leaf galls, Neurotems verruoarwm (Osten Sacken), 

 N. niger Gillette, N. varians Kinsey, A T . fioccosus (Bassett). 



Distribution. — California, District of Columbia, Illinois, New York, 

 Virginia. 



TETRASTICHUS CARPATUS, new species 



Varying from very dark brown with iridescent bluish cast to black 

 with iridescent blue-green luster; antennal flagellum, apices of femora, 

 bases and apices of tibiae, and basal segments of tarsi yellow or 

 white; apex of antennal pedicel lighter in color than base; males 

 usually considerably lighter than females. 



Female. — Length, 1.1-1.6 mm. Antennae inserted slightly ventrad 

 of level of ventral margins of compound eyes; scape short, its apex 

 not reaching level of ventral margin of anterior ocellus ; pedicel con- 

 spicuously enlarged at apex; first funicle segment one-sixth shorter 

 than pedicel, second and third segments wider than first and each 

 shorter than first, club as long as pedicel and first funicle segment; 

 length of malar space three-fourths height of compound eye, malar 

 furrow gently curved, almost straight; length of postocellar line 

 four times as great as ocellocular. Mesopraescutum slightly wider 

 than long and bearing three sometimes irregular rows of bristles at 

 each lateral margin, each row usually consisting of but three to five 

 bristles, and sometimes only two bristles present in a row; submar- 

 ginal vein of forewing with two dorsal bristles; apex of hindwing 

 blunt, fringe at posterior margin slightly less than one-fourth as wide 

 as wing at hamuli. Propodeum lightly shagreened, vague paraspir- 

 acular carinae present; propodeal spiracles round, mesal length of 

 propodeum one-third dorsal length of mesoscutellum ; gaster elongate, 

 acuminate, from one and two-thirds to two times as long as thorax. 



Male. — Length, 0.8-1.3 mm. Scape broadened from near base to 

 apex, pedicel globose, one-fifth longer than first funicle segment, all 

 funicle segments beadlike, approximately equal in length, with first 

 segment slightly narrower than fourth, conspicuously long setae absent, 

 club one-sixth shorter than three funicle segments; gaster slightly 

 longer than thorax. 



Type locality. — Monrovia, Calif. 



Types.— U.S.N.M. No. 56252. 



Described from 105 female and 9 male specimens. Female holo- 

 type, male allotype, and 66 female and 4 male paratypes, from the 

 type locality, reared from Apanteles carpatm (Say), Wm. Moore; 

 13 female paratypes, Columbus, Ohio, reared from clothes moths 

 in 1934, H. C. Mason; 4 female paratypes, Columbus, Ohio, reared 

 from Tin-cola biselliella Hummel. November 24, 1931, H. C. Mason; 

 6 female and 3 male paratypes, Silver Spring, Md., August 1931, from 

 Tinea pellionella Linnaeus, W. Colman; 1 male and 9 female para- 



