NORTH AMERICAN TETRASTICHUS — BURKS 565 



18, 1921, reared from gall of Neuroterus saltatorius (Riley), C. T. 

 Dodds; 1 female paratype reared from gall of Andricus kingi Bas- 

 sett, C. T. Dodds; and 1 male paratype collected May 26, 1907; also, 

 6 female and 7 male paratypes from Los Altos, Calif., May 18, 1922, 

 E. O. Essig; 1 female and 3 male paratypes, Beaverton, Oreg., June 

 1, 1934, reared from an undetermined gall on Quercus garryana, under 

 Hopkins U. S. No. 20559a; 2 female and 2 male paratypes, Los An- 

 geles, Calif., reared from gall of Callirhytis bicornis McCracken and 

 Egbert, April 1940, It. H. Smith ; and an additional single male para- 

 type was collected at Mesilla, N. Mex., May 31, 1938, by Christen- 

 son and Clancy, and bears the number C-9504. 



TETRASTICHUS VERRUCARII Balduf 



Figure 19, e 

 Tetrastichus verrucarii Balduf, Can. Ent, vol. 61, pp. 125, 221, 1929. 



Dull, dark brown, occasionally with very faint iridescent reflections; 

 antennae sometimes, apices of femora, tibiae, and basal segments of 

 tarsi white ; abdomen of male may be white at base. 



Female, — Length, 1.3-1.6 mm. Antennae inserted at level of ven- 

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

 anterior ocellus, first funicle segment one-sixth longer than second, 

 second and third segments equal in length, club two and one-half 

 times as long as first funicle segment; malar space one-half height 

 of compound eye; malar furrow straight; postocellar line twice as 

 long as ocellocular. Mesothoracic spiracle only partly covered by 

 minute emarginate flange; mesopraescutum slightly wider than long 

 and surface completely covered with bristles (fig. 19, e) ; submarginal 

 vein of fore wing with three to five dorsal bristles, marginal vein 

 three and one-half to four times as long as stigmal; apex of hind- 

 wing blunt, fringe at posterior margin one-fifth width of wing at 

 hamuli. Propodeum very faintly reticulated, almost smooth, median 

 carina only present ; mesal length of propodeum one-fourth length of 

 mesoscutellum ; propodeal spiracles contiguous with anterior margin ; 

 gaster equal to or only slightly longer than thorax. 



Male. — Length, 1.0-1.4 mm. Antennal scape with darkened an- 

 terior carina two-thirds as long as scape; pedicel and first funicle 

 segment equal in length, second, third, and fourth equal and each 

 one-quarter longer than first, setae slightly longer than segments borne 

 on dorsal elevations near bases of segments, club as long as pedicel and 

 first two funicle segments; postocellar line three times as long as ocel- 

 locular. Gaster as long as thorax. 



Type locality. — Urbana, 111. 



Types.— U.S.N.M. No. 40986. 



