1 82 NEW YORK STATE MUSEUM 



1896 Kieffer, J. J. Berln. Ent. Zeitschr., 41: 3, 26 



1897 Syn. Cecid. de Eur. & Alg., p. 44 



1900 Soc. Ent. Fr. Ann., 69: 446 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 419 



191 1 N. Y. Ent. Soc. Jour., 19: 41 



1913 Kieffer, J, J. Gen. Insect., fasc. 152, p. 269 



This genus is separated from Porricondyla Rond. by the antennae 

 not being greatly prolonged in both sexes. The typical venation is 

 illustrated on plate 4, figure 8. A number of American species 

 having from 12 to 26 antennal segments, have been referred to this 

 genus though, owing to the fact that we have not reared any species 

 in this group, it is possible that some of the forms should be placed 

 in other genera or that sexes described as distinct should belong 

 together. 



The type species, Cecidomyia lateritiaH. Lw., has 14 

 antennal segments, the fifth of the male with a stem one-fourth the 

 length of the cylindric basal enlargement, which latter has a length 

 two and one-half times its diameter; low, straight circumfili occur 

 at the middle and subapically and are united by long fili. There 

 is a subbasal whorl of sparse setae. The palpi are very long, quad- 

 riarticulate, the terminal segment being nearly twice the length of 

 the preceding. Subcosta unites with costa just before the basal 

 half; the third vein, joined to the middle of subcosta by a distinct 

 crossvein parallel with costa, unites with the margin well beyond 

 the apex, the basal portion being nearly straight; the fifth vein 

 joins the posterior margin at the distal fourth, its branch at the 

 basal third, the two uniting rather indistinctly near the basal foiu-th. 

 Rubsaamen, illustrating the male genitalia, represents the basal 

 clasp segment as short, broadly oval and with the apex internally 

 ornamented with stout, presimiably chitinous tubercles and states 

 that the terminal clasp segment is wanting. 



This is based on published descriptions supplemented by studies of 

 a balsam preparation in the Berlin Natural History Museum made by 

 Professor Rubsaamen and labeled as being from the Loew collection. 



Key to species 



a 12 antennal segments 



b Fifth antennal segment with a stem one-third the length of the basal enlarge- 

 ment 

 c Abdomen yellowish, length l mm; female. ..sylvestris Felt, C. 175 

 aa 13 antennal segments 



b Fifth antennal segment with a stem one-fourth the length of the basal 

 enlargement 

 c Abdomen dark brown, length 2.5 mm; female. . . .h a m a t a Felt, C. 142 

 aaa 16 antennal segments at least 



