332 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



usually loiijjtT tliiin wide, roiiiuled iMKsteriorly » r subtniiu'iitc and pro- 

 duced beyond tlu^ insertion of coxa*. Front wii gs with :i triangular or 

 Betnicireular stiginate«l nuirginul vein situated ukicIi beyond the middle 

 of the wing, a very short, sometimes ahuost obsolete, marginal cell, and 

 a closed costal cell; and often with traces of discoidal nervines; hind 

 wings broad, veinless. Alxhnuen petiolated or subpetiolated, conic- 

 ovate, the second segment very large; in tlie nuile terminating in two 

 prongs; in the fenuUe prolonged into a hmg, tubular case, inclosing 

 the ovipositor. Legs rather long, the femora clavate, tibial spurs 1, 2, 

 2, well developed, the tarsi long, 5 jointed, claws simple. 



This group, from which the family <lerive8 its name, was first de- 

 scribed by Latreille in 170G. It is at once distinguished by the eden- 

 tate mandibles and the shape of the abdomen ; in the female the abdo- 

 men being prolonged into a long, tubular case, inclosing the ovipositor, 

 while in the male it terminates in two i)rong8. 



The Proctotrypincc attack apparently only Dipterous and Coleopterous 

 larvJB living in fungi. 



The only instiince of the rearing of a species in Ameri(!a is by Prof. 

 Comstock, who reared Proctotrypen ohsoletus Say from the Coleopterou 

 Sti'lidota strigosa. In Europe, the habits of about a dozen species are 

 kuown, all bred from Coleopterous and Dipterous larva> living in fungi. 



The genera are not numerous, and may be recognized by the aid of 

 the following synoptical table: 



TABLE OF GENERA. 



FEMALES. 



Abdomen terminating in a styhis. 



Wingless 2 



Winged; maxillary palpi 4-jointed, long, the last joint linear. 



Parapsidal furrows distinct DisoGMUs Forster. 



Parapsidal furrows wanting Proctotrypks Latr. 



2. Maxillary palpi 3-jointed, short, the last joint subclavate. 



Metathorax smooth CoDRUS Jurine. 



"'■-■•'''■ -'"'" MALES. ''■ .■^' 



Abdomen terminating in two prongs; winged. 

 Maxillary palpi 4 jointed, long, the last joint linear. 



Parapsidal furrows distinct Disogmus Forster. 



Parapsidal furrows wanting Proctotrypes Latr. 



Maxillary palpi 3-jointed; short, tho last joint subclavate. 



Metathorax smooth Codrus Jurine. 



DISOGMUS Forster. 



Hym. Stud., ii, p. 99 (1856). 



(Type D. areolator Hal.) 



(Pl. XIII, Fig. 6, $ .) 



Head transverse or subquadrate. 



Antennae 13-jointed, long, the joints cylindrical, pubescent, or pilose^ 

 some of the joints in the male sometimes dentate. 



