170 NEW YORK STATE MUSEUM 
Numerous females were taken in association with the males and 
are doubtless referable to the same species. A description of this 
sex 1s supplementary to the original account. 
Female. Length 1.5 mm. Antennae a little longer than the 
body, sparsely haired, yellowish brown; 15 segments, the fifth with 
a stem about three-fourths the length of the cylindric basal enlarge- 
“ment, which latter has a length nearly twice its diameter and bears 
a thick band of stout, strongly curved setae; the fifteenth segment 
long, slender, swollen basally. Palpi; first segment irregular, the 
second subquadrate, with a length nearly three times its diameter, 
the third a little longer, more slender, the fourth one-half longer 
than the third, somewhat dilated. Ovipositor short, stout, the lobes 
narrowly oval and sparsely haired. Other characters nearly as in 
the male. 
FELTIELLA Rtibs. 
1910 Rubsaamen, E. H. Zeitsch. Wissenschaft. Insektenbiol., 15:285; 
16:280-81 
1911 Felt, E.P. N.Y. Ent. Soc. Jour., 19:54 
1913 Kieffer, J. J. Gen. Insect., fasc. 152, p. 202 
This genus was erected for certain small forms with the anterio! 
claws cleft, the pulvilli about one-half the length of the claws and 
with a subtriangular setose or spinose lobe at the inner angle of the 
basal clasp segment, much as in Lestodiplosis. The type of this 
genus is F. tetranychi Ribs, 
We have included in this group a number of small, mostly yellowish 
midges easily separated from Co quillettomyia Fer by the 
feebly chitinized harpes and the union of the third vein with costa 
a little before the apex of the wing or just at its apex. These two 
characters also serve to distinguish the species placed in this genus 
from the series referable to M ycodiplosis Rtbs. There are 
forms presenting such a combination of characters that it is dif- 
ficult to draw the line between those which should be placed in 
this genus and others belonging in Mycodiplosis, though there is 
no question but that the more typical series of each genus repre- 
sents a valid, generic concept. The larvae are presumably pre- 
daceous on mites and aphids. 
Key to Species 
a Harpes or basal lobe of the basal clasp segment setose 
b Stems of the fifth antennal segment of the male each with a length two 
and one-half times the diameter 
c Abdomen light fuscous yellowish, ventral plate broadly rounded.... 
davisi Felt, a2643 
cc Abdomen pale yellowish, ventral plate deeply and triangularly 
CINAS SU AiLe tei etn eae Oey --..€mMarginata Felt, C. 191 
