OCT. 1906. 
NORTH AMERICAN PARASITIC HYMENOPTERA. 
145 
3. Antennae unicolorous, entirely black or fuscous (at least in the 
female) 4 
Antennae bicolored, at least the scape pale or yellow 9 
4. Legs entirely black 5 
Legs in part yellow or pale 6 
5. First flagellar joint 2*/ 2 times as long as thick, penultimate iy 2 
times as long as thick (male) glabricornis Kieffer 
First flagellar joint 4 times as long as thick, penultimate 2y 2 
times as long as thick (female) unicolor Ashmead 
6. Pedicel not longer than the first flagellar joint 7 
Pedicel as long as the first and second flagellar joints together 
salicicola Ashmead 
7. Second abdominal segment a little longer than the rest united, 
second flagellar joint hfalf the length of the first. 
melanocerus Ashmead 
Second abdominal segment twice as long as the rest united .... 8 
8. Female. Second flagellar joint % the length of the first. 
carinatus Ashmead 
Male. Flagellum longer than the body, scape brownish yellow. 
carinatus Ashmead 
Male. Flagellum considerably shorter than the body, scape 
black brevicornis sp. nov. 
9. Head and thorax closely, distinctly punctate 10 
Head and thorax smooth, or at least finely shagreened 11 
10. Plurae aciculated, flagellar joints 2-5 transverse." 
punctatus Ashmead 
Plurae smooth, flagellar joints 2-5 longer than thick. 
quissetensis sp. nov. 
11. Legs uniformly yellow or pale brown 12 
Legs with the femora and tibiae infuscated, wings subfuscous, 
first flagellar joint as long as the pedicel, flagellum subclavate. 
am pi us Ashmead 
12. Thorax black, collar sometimes pale 13 
Collar black, maculate with yellow on each side, post-scutellum 
not spined, first flagellar joint % as long as the pedicel 
croceipes Brues 
13. Wings clear hyaline 14 
Wings subfuscous or tinged with yellowish 16 
