420 NEW YORK STATE MUSEUM 
CINome VOlouimsa, lean 2 mains ieMMAlle o5ccccc0c0oouscnsc 
DIAGCLOM Mae ww, Se, Ce AG 
aaaa 20 or more antennal segments 
b Abdomen yellowish orange, length 3 mm; 24 antennal segments, the 
5th with a stem % the length of the basal enlargement, which 
latter has a length 3 times its diameter; the 4th palpal segment 4 
longernnthannthiers due eee ee er CAMAGEMSIS mM, Sd, Co OF2 
bb Abdomen light reddish brown, length 3 mm; 25 antennal segments, 
the 5th with a stem % the length of the basal enlargement, which 
latter has a length 2174 times its diameter; 3d and 4th palpal 
Semana meaielhy Goal, osocacsocccodcn MOMEA ME mh SD. Co OB 
bbb Abdomen pale yellowish, length 2 mm; 26 antennal segments, the 
5th with a stem 1% the length of the basal enlargement; the 4th 
palpaleseeiments 2 loneer thanethe od eee eee eerie ne ee 
MBCA PELCMIAES m, op, C, San 
HOLONEURUS Kieff. 
This genus may be separated from Porricondyla and Dirhiza 
by the fifth vein being simple [pl. 39, fig. 3] and the four palpal seg- 
ments distinguish it from Colomyia Kieff. 
Key to species 
a 12 antennal segments, the stem of the 5th as long as the basal en- 
largement 
b Abdomen! yellowish, leneth 1.25 mim females... - ee ne eee 
CIVMOtricoOmedywila) gilviritw@ea Ine C. x0 
aa 16 antennal segments, the 5th with a stem twice the length of the basal 
enlargement 
b Abdomen yellowish brown, length 2 mm; male ............:...- 3 
SlOMS AES wm, So, C, O54 
aaa 25 antennal segments, the 5th with a stem %4 longer than the basal 
enlargement 
beAbdomentdtliievellowiis ie lene:tiies nara; Caries te ienteee nie 
Mn Cem OG S vin, Sos, C. R28 
Asynapta H. Lw. 
This genus may be recognized by the four long, simple 
veins, the fifth being simple, and by the cross vein being parallel 
or nearly so with costa [pl. 30, fig. 6]. 
Key to species 
a 16 antennal segments, the 5th with a stem 1%4 longer than the basal en- 
largement ce 
b Abdomen yellowish brown, length 2 mm, the basal enlargement of 
the 5th antennal segment with a length 3 times its diameter; the 
wnat! Chis Sacmment lbromcllhy twemmmeullaie, 6, ...00casccqcenseocese 
OQ UMinGirPe2is) wwe eca ce IO CO, oxo 
