112 NEW YORK STATE MUSEUM 



unequal length. Tlie entire wing is so thickly covered with 

 microscopic hairs that it appears nearly opaque. There are 

 several peculiarities in the venation to which the author calls at- 

 tention. The Ri^5 does not reach the margin; parallel to and 

 above it is a vein (perhaps a fold) which enters the margin; 

 the latter vein is not connected with any vein at its base. Above 

 this is a forked vein (fold) which has no connection at its base. 

 This is absent in the female. This forked vein or fold is of com- 

 mon occurrence iui many C e' r a t o p o g o n wings. Upon each 

 side of the cubitus there is a vein (probably a fold) running 

 parallel to it. These folds are absent in the female. The 

 halteres have prominent knobs. According to the text (but not 

 the figure) the vein which enters the anterior wing margin be- 

 fore the mid-length of the wing has a point of contact with the 

 bend of the one which enters the anterior margin a little distad 

 of the middle. The legs and antennae are like those of C e r a- 

 topogion. In regard to the male antennae the author says: 

 " Das 2te Glied diese Ftihler hat der langen Haarbusch welcher 

 Ceratopogon kennzeichnet, aber an der Spitze ist es so zu sagen 

 gaffelig frisert und seine Innenseite nicht so glatt wie die Aus- 

 senseite, well erstere kleine borstige Haare zeigt welche ein wenig 

 vorragen." 



Each joint of the antennae of the female possesses four long 

 hairs^ each hair about as long as the antenna. 



Type of the genus D. h o r torn m, Weyenbergh^ 1. c. 



It does not appear that the venation differs materially from 

 some species of O er a t o p ogoni. Compare the wing of 

 O. ro stratus Winn., pl.IY, fig.23, Winnertz (1852). The 

 other characters given certainly do not distinguish it, and there- 

 fore this genus must be considered as a synonym of either 

 C e r a t oi p o g o n or u 1 i c o i d e s. 



Genus 10. Belgica Jacobs 

 Ann. de Soc. Belgique. 106. 1900 

 The head somewhat rounded, longer than high, a little wider 

 than the thorax. Face flat, the eyes not emarginate, placed at 

 half the hight of the face, "eyes not smooth." Antennae in- 

 serted opposite the eyes, a little lower than their transverse 



