590 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 0& 



propodeal spiracles well separated from anterior margin; gaster 

 from one and two-thirds to twice as long as thorax. 



Male. — Length, 1.4-1.75 mm. Pedicel and second to fourth funicle 

 segments each equal in length, first funicle segment one-fourth shorter, 

 funicle segments subquadrate, without conspicuously long bristles, 

 club as long as funicle ; gaster and thorax equal in length. 



Type locality. — Rosslyn, Va. 



Types— U.S.N.M. No. 41334. 



Hosts. — Chlamys gibbosa (Fabricius), Chlamys spp. 



Distribution. — District of Columbia, Illinois, Maine, Maryland, Min- 

 nesota, Mississippi, Virginia. 



TETRASTICHUS GERSTAECKERIAE Gahan 



Tetrastichus gerstaeckeriae Gahan, Proc. U. S. Nat. Mus., vol. 83, p. 485, 1936. 



Very dark brown or black with iridescent blue-green reflections; 

 antennae, trochanters, apical third of femora, tibiae, and tarsi yellow. 



Female. — Length, 2.0-3.0 mm. Antennae inserted at level of ven- 

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

 margin of anterior ocellus, all funicle segments equal in length and 

 each three-fourths as long as pedicel, club as long as two funicle seg- 

 ments combined; postocellar line two and one-half times as long as 

 ocellocular. Mesopraescutum as wide as long and bearing one row of 

 bristles at each lateral margin; submarginal vein of forewing with 

 three or four dorsal bristles; apex of hindwing blunt, width of fringe 

 at posterior margin one-fifth width of wing at hamuli. Surface of 

 propodeum smooth, or very faintly roughened, median carina only 

 present; mesal length of propodeum one-fifth length of mesoscutel- 

 lum; propodeal spiracles separated from anterior margin by a space 

 equal to one-half diameter of a spiracle ; gaster from twice to almost 

 three times as long as thorax. 



Male. — Length, 1.4 mm. Scape greatly enlarged, globular, darkened 

 anterior carina extending from near base to apex ; first funicle segment 

 one-third shorter than pedicel, three following funicle segments equal 

 and each one-fifth shorter than first, club as long as first two funicle 

 segments, segments quadrate, and bearing setae no longer than those 

 on female antennae ; gaster as long as thorax. 



Type locality. — Probably Uvalde, Tex. 



Types.— U.S.N.M. No. 51450. 



Hosts. — Cactus weevils, Gerstaeckeria porosa (LeConte), Ger- 

 staeckeria nobilis (LeConte). 



Distribution. — Texas. 



TETRASTICHUS RUGGLESI Rohwer 

 Tetrastichus rugglesi Rohweb, Can. Ent, vol. 51, p. 160, 1919. 



Brown, with purple and blue-green iridescence; antennae, tro- 

 chanters, apices of femora, tibiae (except for occasional vague ring 



