NORTH AMERICAN TETRAST1CHUS — BURKS 555 



ered with bristles, some of which are contiguous with mesal furrow 

 (fig. 19, e) ; submarginal vein of forewing with four to six dorsal 

 bristles ; apex of hindwing blunt, fringe at posterior margin one-sixth 

 width of wing at hamuli. Surface of propodeum smooth, median 

 carina only present; mesal length one-third length of mesoscutellum, 

 propodeal spiracles almost contiguous with anterior margin, length 

 of spiracle one-half length of lateral margin of propodeum ; minute 

 petiole usually discernible; gaster slightly longer than thorax. 



Male. — Length, 1.2-1.9 mm. Scape with darkened anterior carina 

 extending from near base to apex; first funicle segment four-fifths 

 as long as pedicel, second and third segments equal in length and 

 each as long as pedicel, fourth segment as long as first, club slightly 

 longer than second and third funicle segments combined, long setae 

 borne singly or in pairs on dorsal sides of funicle segments, these 

 setae slightly longer than segments bearing them; gaster as long as 

 or slighter longer than thorax. 



Type locality. — Germany. 



Types. — Presumably in the Forestry Academy in Eberswalde, Ger- 

 many. 



Hosts. — Egg capsules of domestic cockroaches, Blatta orientalis 

 (Linnaeus), Blatella gei^manica (Linnaeus), Periplaneta americana 

 (Linnaeus), P. australasiae (Fabricius), and possibly other roaches. 



Distribution. — Probably worldwide; commonly collected or reared 

 in the eastern and southern United States and the West Indies 

 islands; also known from South and Central America, Europe, the 

 Hawaiian Islands, and the Orient. 



TETRASTICHUS CASSIDIS, new species 



Dull brown, with scape, pedicel and funicle of antenna, areas bor- 

 dering sutures on mesopleuron, apices of f orecoxae, entire middle and 

 hindcoxae, femora, tibiae, and tarsi light yellow; antennal club 

 slightly darkened, and pedicel and funicle sometimes darkened toward 

 apices. 



Female. — Length, 0.8-1.0 mm. Antennae inserted at level of ventral 

 margins of compound eyes and only slightly ventrad of center of f rons ; 

 apex of scape reaching level of vertex ; pedicel slightly shorter than first 

 funicle segment; all funicle segments equal in length, club as long as 

 two funicle segments combined ; postocellar line as long as ocellocular 

 line. Mesopraescutum wider than long and bearing one row of bristles 

 at each lateral margin ; submarginal vein of forewing with two or three 

 dorsal bristles. Surface of propodeum covered with minute reticula- 

 tions, paraspiracular carinae vague or absent; mesal length of pro- 

 podeum one-third as great as length of mesoscutellum; propodeal 

 spiracles contiguous with anterior margin; gaster ovoid, slightly 

 shorter than thorax, venter with conspicuously long bristles. 



