CECIDOMYIA. 17 Y 



Epidosis Lw. Second longitudinal vein sinuose before the cross- 

 vein (fig. 4) ; joints of the antennae pedicelled in both sexes ; 

 their number variable. 



II. Wings with four longitudinal veins (fig. 5). 

 Asynapta Lw. The cross- vein is sometimes like that in section A, 

 and then the second longitudinal vein is not sinuated ; some- 

 times as in section B ; then the second longitudinal vein is 

 sinuated, like in Epidosis (fig. 5) ; in this case also the collare 

 is a little prolonged. 



The classification of the section Anaretina Loew, is very imper- 

 fect ; almost nothing is known about their habits, and even their 

 position in the system is doubtful. Mr. Loew considers them, at 

 least provisionally, as a sub-section of the Cecidomyidce, whereas 

 Mr. Winnertz prefers to isolate them as a distinct family, placed 

 between the Cecidomyidce and the Mycetophilidce, and having many 

 points of relationship to both. 



Following the authority of Mr. Loew in this volume (p. T), I 

 will confine myself to the enumeration of the genera which he 

 refers to this section, adding only short sketches of their characters 

 as I find them in the former writers. 



I. Ocelli extant ; 



Wings bare or almost "bare ; third longitudinal vein forked, the two 

 following veins simple. 

 Antennae 16-jointed; % verticillate, joints pedicelled; 9 pubes- 

 cent, joints sessile; branches of the fork of the 3d longitudinal 

 vein very arcuated at base (fig. 8, wing). Zygoneura Meig. 



Antennae 9-jointed, short, slightly pubescent ; joints subsessile, sub- 

 globose (fig. 9, wing). An arete Hal. 



Wings pubescent ; 



Third longitudinal vein forked. 



The upper branch of the fork forms a double curve, almost in the 



shape of an $ ; (see Plate I, fig. 13.) Tritozyga Lw. 



The upper branch of the fork forms a single smooth curve ; % 



antennse 16-jointed, verticillate, joints pedicelled; £ antennae 



10-jointed, pilose, joints momliform (fig. 10, wing). 



Catocha. Hal. 

 12 



