314 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 45. 



Type-locality.—ljSiiaiyette, Indiana. 



Described from a series of 18 specimens reared from Agromyza 

 angulata by P. Luginbill, and recorded under Bureau of Entomology, 

 United States Department of Agriculture, note number, Webster 

 No. 9700. 



Type.— C&t. No. 15549, U.S.N .M. 



This species is named in honor of Arnold Foerster, whose work is 

 the foundation of the modern classification of the Chalcidoidea. 



CERCOCEPHALA ATROVIOLACEA, new species. 



Female. — Length about 3 mm. Black, smooth and polished, the 

 head with a purple luster, the thorax above with bluish and greenish 

 luster, the abdomen with a purple luster; head oblong, the mandibles 

 enlarged, reddish, 4-toothed at apex; ridge between antennae broad, 

 flattened, projecting, anteriorly truncate at a right angle, the ex- 

 tremity rounded; funicle 6-jointed, the first joint subquadrate, the 

 pedicel about as long as joints one and two combined; antennal 

 fossae carinate exteriorly, just outside these fossss a vertical slightly 

 depressed area, about the width of the fossa, and finely vertically 

 striate; propodeum basally finely transversely striate; elsewhere 

 smooth; wings hyaline with a brown band at stigmal vein which 

 does not extend apicad of the stigmal vein but extends basad of the 

 base of the stigmal vein for somewhat more than the length of the 

 stigmal; stigmated spot on submarginal vein without a tuft of hairs; 

 legs concolorous with the body, the anterior tibiae and all tarsi 

 reddish testaceous. 



Male. — Unknown. 



Type-locality. — Las Vegas Hot Springs, New Mexico. 



Described from seven specimens reared from Piiion cones infested 

 by an undescribed genus of Scolytidae, and recorded under Bureau 

 of Entomology, Department of Agriculture, note number 9487. 



Type.— C&t. No. 15550, U.S.N .M. 



The large size, entirely dark color, the flattening of the dorsal 

 aspect of the ridge between antennae and the rounding off of its 

 anterior angle distinguish this species. 



Family EULOPHID^. 



DEROSTENUS AGROMYZA, new species. 



Female. — Length about 0.87 mm. Similar in color and sculpture 

 to D. punctiventris, but the wings without any stigmal cloud and 

 none of the tibiae annulate; all femora, except apices, aeneous, 



Male. — Length about 0.70 mm. Similar to the female, except in 

 secondary sexual characters; the scape somewhat flattened and dilated 

 in front, the dilated portion thin. 



