186 BULLETIN OF WISCONSIN NATURAL, HISTORY SOCIETY. VOL. 3, NO. 4. 
second wider sharply defined one beginning at the base of the 
stigma and reaching two-thirds of the way to the wing tip; 
neither band reaches the posterior margin of the wing. Stigma 
black ; the stigmal vein as long as the stigma, knobbed at the tip. 
Described from a female specimen from Mexico, collected by 
Mr. E. A. Schwartz. Type in the collection of the American 
Entomological Society. 
This species comes near to Cameron's Dryiwus alMtarsis 
(Biol. Cent. Am. Hym. 447.) but is distinct by its annulate 
antennae and different sculpture. 
cosilim;. 
SIEROLOMORPHA Ashm. 
This peculiar Cosilid genus is represented by but a single 
species which occurs in the United States, previously known 
only in the male sex. 
In a lot of Bethylids recently received from Mr. H. L. 
Viereck there are a large number of males and two female speci- 
mens. 
The female differs from the male by its more strongly thick- 
ened femora and stout tibiae, and by the incrassated antennae 
which are only 12 jointed (13 jointed in the male). The head 
and thorax are more shining, being very highly polished. The 
legs, except coxae, are ferruginous. 
The single species, S. ambigua Ashm. (Bull U. S. N. M. 45, 
56) is widely distributed. I have seen specimens from New 
Hampshire, Connecticut, Massachusetts, Georgia, and Van- 
couver. 
PROCTOTRYPID^. 
DISOGMUS GBSOLETUS sp. nov. 
Female. Length 2.5 mm. Black, more or less brownish, 
shining ; legs brownish yellow. Head transverse, about two and 
one-half times as wide as long antero-posteriorly ; smooth and 
polished above, front prolonged below forming a strong carina 
between the antennae ; eyes large and convex, sparsely hairy. 
Lower part of face roughly sculptured, brownish ; mandibles 
rufous, palpi pale yellow. Antennae slightly longer than the 
head and thorax, brownish yellow, darker apically and at the in- 
cisures. Scape sub-globose, pedicel very small, only about one- 
third the length of the first flagellar joint ; second flagellar joint 
