170 NEW YORK STATE MUSEUM 



Niimerous females were taken in association with the males and 

 are doubtless referable to the same species. A description of this 

 sex is 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 foiu-th 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 Rilbs. 



1910 Riibsaamen, E. H. Zeitsch. Wissenschaft. Insektenbiol,, 15:285; 

 16:280-81 



191 1 Felt, E. P. N. Y. Ent. Soc. Jour., 19:54 

 1913 Kjeffer, J. J. Gen. Insect., fasc. 152, p. 202 



This genus was erected for certain small forms w4th the anterfo 

 claws cleft, the pul villi 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 t^^pe of this 

 genus isF. tetranychi Riibs. 



We have included in this group a number of small, mostly yellowish 

 midges easily separated from Coquillettomyia Felt 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 y c o d i p 1 o s i s Rubs. 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 .... 



d a V i s i Felt, a2643 



cc Abdomen pale j^ellowish, ventral plate deeply and triangularly 



emarginate emarginata Felt, C. 19 1 



