NO. 1984. DE8CRTPTI0NS OF NEW HYMENOPTERA, 7— CRAWFORD. 315 



Type-locality. — Lafayette, Indiana. 



Host. — AgroTYiyza angulata. 



Described from a series of 17 specimens reared by P. Luginbill 

 and recorded under Bureau of Entomology, United States Depart- 

 ment of Agriculture, note number, Webster No. 9700. 



Type.— C&t. No. 15551, U.S.N.M. 



DEROSTENUS ARIZONENSIS, new species. 



Female. — Length about 1.12 mm. Similar in color and sculpture 

 to D. punctiventris, but the wings without a stigmal cloud, the hind 

 tibiae with a small spot near base, or this a complete annulus but no 

 broader than the yeUow basad of it ; front tibiae with a narrow black 

 stripe J)eneath ; mid tibiae with a mark similar to that on posterior 

 tibiae or both the front and mid tibiae ahnost immaculate. 



Male. — Length about 0.7 mm. Similar to the female, except in 

 secondary sexual characters, but the spot on the hind tibiae very 

 small. 



Type-locality. — ^Tempe, Arizona (type female) ; Chandler, Arizona 

 (allotype male) . Paratypes from both localities. 



The 14 specimens were reared from Agromyza in alfalfa and are 

 recorded under Bureau of Entomology, United States Department 

 of Agriculture, note numbers, Webster No. 7215 (type female) and 

 8771 (allotype male). The paratypes from Tempe bear the number 

 7215 and the one from Chandler the number 8771. 



Type.— Cat. No. 15552, U.S.N.M. 



The spot on the hind tibiae is as variable in the male as it is in 

 the female. 



This species comes near (Entedon) Derostenus diastatae Howard and 

 D. agromyzse Crawford, but the former has a wide annulus on the 

 hind tibiae and the abdomen weakly sculptured, and the latter has 

 the tibiae immaculate. 



DEROSTENUS VARUPES, new species. 



Female. — Length about 0.75 mm. Similar in color and sculpture 

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

 front and middle legs, except coxae, entirely paUid; hind femora, 

 except apices, aeneous, the hind tibiae not annulate. 



Male. — Unknown. 



Type-locality.— IjSifsijette, Indiana. 



Host.— Agromyza pusilla. 



Described from one specimen reared by P. Luginbill and recorded 

 under Bureau of Entomology, United States Department of Agricul- 

 ture, note number, Webster No, 6395. 



Type.—Csit. No. 15553, U.S.N.M. 



The immaculate front and middle legs distinguish this species. 



