FAM. EMPIDIDZE 29 
13. Costal cell much widened . . . . ES I M WEN eraat ie 14. 
Costal cell scarcely or not at all Mideuod e ARERASRE CI e m IN VG ECT e I MT OR TUA NE 12. 
IM Un wIhBb bIuSIMISIe P. Wo SUL AHEIPILCR Ie NUN ere e om cn e D ig 15. 
NEN UM E Cd edu eem. ee RR es 16. 
15. Mesonotum vittate; middle tibia yellow; wings uniformly 
USE Red dE CPI mM CU Queue T INPRORR, Walker. 
Mesonotum not vittate; middle tibie dark; wings with 
Byalnedpex o0. 2 Desnudas s.s c TA EURYPTERUS, Bez2i. 
16. Abdomen with bronze lustre; wings apically hyaline . . E. priuiDrATUS, Walker. 
Abdomen black; wings dark at apex. . . . . . . . E.raArIPENNIS, Bezzi. 
17. Base of wings distinelly darker than apical portion... 7. 2 20. LV 2o. e S. 18. 
Wings entirely hyaline or subhyaline to the base, the 
matnoccieti cU encEDS D VUL cS Me c SU MEME PE CAEN MEE 335 
CEpeeustg cupisiv guia c Me NOR E CREE Lu pr RESI I9. 
Stigma obsolete, sometimes the entire marginal cell carries 
forward the basal darkening of the BEP ELEME CURT QN QU uU iR I E ere 23. 
Io Mesngdim purple; DNI DESESdm. uo 9. sou EIN Ld n C SEI E RO 20. 
DENM. 2 v aute qeu Qu ru. s 22. 
2o c-Hroubibie Dc uno ur ve eC u.c B. PILOSUS, Schiner. 
SDN uM cuc LN LN .-et. e ron; 21. 
21. The fine villous coating at sides of mesonotum gray. . . E.rozwr, Wheeler & Melander. 
Thefine villous coating brown . . . . . . . . . E.zrrcrus, Melander. 
E LesbsqmuOSENADIBGE e S o rA e NI M TABASCENSIS, Wheeler & Melander. 
Legs browhish yellow... . . . . ..... . . . . - E. cRassiPES, Fabricius. 
23. Brown ofbáseof wingsinvadingdiscal cell. . . . . . «. .. . . . . « «4... s 24. 
Discal cell wholly hyaline . . . MC c PN Ee a dr. 27; 
24. Geniculation of hind tibiz reddish ; Brains xiboss nga EM I TA LE 25. 
Hind knees black; pygidium longer than wide, with long 
apical process from ventral valve; base of ovipositor 
(UBtodsqg pce HMM Wlkero c o E eve ege 26. 
25. End processes of pygidium short; ovipositor simple. . . E. puPrEx, Walker. 
End processes as long as body of pygidium, that of upper 
antennal length. Hairs of the notum sparse and yellow, scutellum with two bristles and four minute hairs, hairs of the 
abdomen sparse. Abdomen with a slight purple tinge, the eighth segment of the female large, jet-black, its base twice as 
wide and thick as the preceding segment, underneath with a strong broad tubercular basal swelling, beyond the basal third 
the segment is suddenly constricted, the small tip being pollinose beneath ; pygidiutn small, upper valve shining, its mar- 
ginal hairs rather long, its apical process notched, terminal filament slender and attenuated to a point. Legs piceous, the 
anterior tibie and tarsi and the hind tarsi brownish yellow, the long bristles of the anterior legs yellow, hind femora 
moderately thickened, spinose below, hind metatarsi of the male with four brown spinous bristles along the outer side, 
entirely lacking in the female, pulvilli pale yellow. Wings uniformly with a faint brownish tinge, the stigma slightly 
darker, costal cell straight. 
White Mountains, New Hampshire, H. K. Morrison, collector. Type in the U. S. National Museum. In subjectus, 
as determined by Coquillett, the hairs of the thorax are black, the base of the wings more or less brownish, especially 
noticeable in the male, the ovipositor simple and slender and much less produced, and the hind metatarsi of the female bear 
small spinous bristles on the outer side, Some specimens of subjectus have these spines black and others yellow in either sex. 
Where they are yellow the base of the wings is less dark. I have specimens of subjectus from New Hampshire, Massachu- 
setts, New York, New Jersey, District of Columbia and Georgia. 
