332 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



usually longer tliaii wide, rounded posteriorly or subtruncate and pro- 

 duced beyond the insertion of coxa^. I^'ront wings witli a triangular or 

 semicireular stigniated marginal vein situated much beyond the middle 

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

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

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

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

 prongs; in the female prolonged into a long, 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 derives its name, was first de- 

 scribed by Latreille in 1790. 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 jn-ongs. 



The Proctotryjnncc attack apparently only Dipterous and Coleopterous 

 larvte living in fungi. 



The only instance of the rearing of a species in America is by Prof, 

 Comstock, who reared Proctotryjws ohsoJeius Say from the Coleopterou 

 Stelidota strigosa. In Europe, the habits of about a dozen species are 

 known, all bred from Coleopterous and Dipterous larvae living in fungi. 



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

 the following synoptical table: 



TABLE OF GENERA. 



FEMALES. 



Abdomen terminating in Ji stylns. 

 Wingless 2 



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



Parnpsidal furrows distinct DisoGMUS Forster. 



Parapsidal iiirrows wanting Proctotryi'Es Latr. 



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



Metathorax smooth Codrus Jnrine. 



MALES. 



Abdomen terminating in two prongs; winged. 

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



Parajisidal furrows distinct DiSOGMUS Forster. 



Parajisidal furrows wanting Proctotrypes Latr. 



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



Metathorax smooth Codri's .Turine. 



DISOGMUS Fiirater. 



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



(Type n. areolator Hal.) 



(PI. xni, Fig. 0, 9.) 



Head transverse or subquadrate. 



Antenniii 13-jointed, long, the joints cylindrical, pubescent, or pilose, 

 some of the joints in the male sometimes dentate. 



