NORTH AMERICAN TETRASTICHUS — BURKS 577 



Male. — Length, 1.3 mm. Pedicel one and two-fifths times as long as 

 first funicle segment, second to fourth segments equal and each twice as 

 long as first, conspicuously long bristles borne by funicle segments on 

 dorsal elevations near bases, club as long as three apical funicle seg- 

 ments combined; interocellar line three times as long as ocellocular; 

 gaster and thorax equal in length. 



Type locality. — Corcoran, Calif. 



Types.— U.S.'NM. No. 18339. 



Eosts. — Probably the clover and alfalfa seed chalcid, Bruchophagus 

 fumebris (Howard), or the alfalfa gall midge, Asphondylia %oebsteri 

 Felt. 



Distribution. — California, Indiana, Iowa ; Eussia. 



Remarks. — This species may be a synonym of the European species, 

 T. brevicornis (Panzer). NikoPskaya 24 held the same opinion. 



TETRASTICHUS XANTHOPS (Ratzeburg) 



Figure 16, k 



Eulophus xanthops Ratzebueg, Die Ichneumonen der Forstinsecten, vol. 1, p. 170, 



1S44. 

 Entedon xanthops (Ratzeburg) Ratzeburg, Die Ichneumonen der Forstinsecten, 



vol. 2, p. 170, 1848 ; vol. 3, p. 215, 1852. 

 Tctrastichtts xanthops (Ratzeburg) Thomson, Hymenoptera Scandinaviae, vol. 5, 



p. 287, 1S78.— Dowden, U. S. Dept. Agr. Techn. Bull. 757, p. 32, 1941. 

 Geniocerus xanthops (Ratzeburg) Kurdjumov, Russ. Ent. Obozr. (Rev. Russe 



Ent), vol. 13, p. 248, 1913. 



Body iridescent green ; variable areas of f rons and antennae, tegulae, 

 and spot at dorsal margin of mesopleuron yellow; front coxae, and 

 apices of middle and hind coxae, and remainder of all legs white ; base 

 of gaster usually white. 



Female. — Length, 1.0-1.6 mm. Antennae inserted slightly dorsad of 

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

 level of ventral margin of anterior ocellus, all three funicle segments 

 equal in length and each slightly longer than pedicel, club two and 

 one-half times as long as a funicle segment ; malar space three-fifths 

 height of compound eye ; postocellar line twice as long as ocellocular. 

 Mesopraescutum as wide as long and bearing two rows of bristles at 

 each lateral margin, median groove vague ; entire mesopleuron almost 

 smooth ; submarginal vein of f orewing with four or five dorsal bristles ; 

 marginal vein five times as long as stigmal ; apex of hindwing acute, 

 fringe at posterior margin one-third width of wing at hamuli, meso- 

 scutellum usually with six bristles. Surface of propodeum faintly 

 reticulated, almost smooth, only a faint median carina present; mesal 

 lengths of propodeum and postscutellum equal; propodeal spiracles 

 minute, separated from anterior margin by a space equal to diameter 



* Rev. Ent. U. S. S. R., vol. 25, p. 119, 1933. 



