NOTES AND DESCRIPTIONS OF NORTH AMERICAN 
PARASITIC HYMENOPTERA. IV. 
By Charles Thomas Bruks. 
A very interesting lot of small Hymenoptera collected by 
'Mr. Charles Schaeffer, of the ^luseiim of the Brooklyn Academy 
of Arts and Sciences, have furnished most of the material 
contained in the following pages. 
They were collected principally in the Southwest, arid were 
kindly sent to me by ]\Ir. Schaeffer for examination. The types 
of these species are in the Brooklyn Museum, those of the others 
in the ^Milwaukee Public ]\Iuseum. 
fa:\iily bethylid^. 
Epyris Westwood. 
A considerable number of species of this large cosmopolitan 
genus have been described from the United States. Some of 
them are very closely allied, but the following table will aid in 
their identification. 
Kieffer includes in Epyris all species previously put into 
Mesifius by Ashmead and others, restricting Mesitius to certain 
forms not occurring in our fauna. I have followed his arrange- 
ment, and our species heretofore placed in this latter genus will 
be found in the table: 
1. Scutelhim with two distinctly separated foveae at the base. ... 2 
Scutellum with a broad transverse impressed line at the base, 
or at least a narrow one connecting two fovese 16 
Scutellum without either groove or fovese ; black, legs and 
antenna^ brown, wings brownish reticulatus Kieffer. 
2. Wings fully developed 3 
"Wings short, reaching to only a little beyond the base of the 
abdomen : legs rufous, metanotum with a faint median 
carina brachypterus Ashmead. 
96 
