30 HYMENOPTERA. 



" (21) Tricliogramuia ceresaruni n. sp. 



Female. Length nearly .04 inch. Reddish-yellow, rather slender. 

 Eyes brown. Abdomen and posterior femora fuscous, the fore and 

 middle femora pale brown ; tibia and tarsi pale. The thorax is tri- 

 angular in front ; the abdomen not longer than the thorax but wider. 

 Wings hyaline, as in T. nigrum* , but with very strong violet reflec- 

 tions. 



Described from two specimens reared from the eggs of the Mem- 

 bracid Ceresa bubalus Say." p. 107. 



It has been listed several times (see citations) but not 

 noticed otherwise in the literature excepting Marlatt's (1895) 

 statement concerning its attack upon Ceresa bnbahis and Gir- 

 ault's (1907) listing of it as a parasite of the eggs of the 

 same species. It is parasitic upon two closely related species. 



The following tagmounted specimens labelled " Tricho- 

 gramma ceresartun Ashm. 2793°. Par. in eggs of Ceresa 

 bubahis. Issued March 22, 25, 30, April 1, 5, 6, 7, 9, 10, 

 1886" were found in the collections of the National Mu- 

 seum: 16 cf' s ; 24 9 's. Also grouped with these seven 

 specimens labelled simply "3793'^", 5 cJ"s, 2 9 's. These 

 specimens have been remounted in balsam on slides. 



6. ZAGA genus novum. 



Normal position. 



Female. — Head normal, the ocelli in a triangle, the lateral 

 ocelli not especially near the eye margins, the antennae 6- 

 jointed — scape, pedicel, 4-jointed club — short, the ring-joint 

 apparently absent. Body long and slender, the abdomen 

 pointed, slender, conic-ovate, longer than the head and 

 thorax combined, the sheaths of the ovipositor distinctly 

 though but slightly exserted, prominent ventrad, running the 

 whole length of the venter, the fore wings broad nearly as 

 in Chaetostricha Haliday, the discal ciliation in peculiarly 

 regular and distinct lines and not dense but abundant, the 

 marginal cilia uniformly short and close, the wing apex very 

 broadly rounded, oblately so, the marginal vein short, straight 

 and clavate, thick, widening distad, the short thick sessile 

 stigmal vein given off nearly at right angles to it and a short 



* This is now the type of the new genus Ufens described in this 

 paper. — A. A. G. 



