CECIDOMYIM;. 127 



16. First and third veins approximated (Diomyza). Lasiopteryx. 

 First and third veins not approximated (5) . Trichopteromyia, 



1. Fourth longitudinal vein simple. ...... 2 



Fourth longitudinal vein furcate; the two 'branches of the fifth, 



when present, are divergent at base of the wing, giving the ap- 

 pearance of longitudinal veins. .... .4 



2. Fifth longitudinal vein furcate near base. . Strobliella K. 

 Fifth longitudinal vein furcate near its middle (Joannisia K., Pe- 



roniviii K., H'asinuniella K., firyomyia K., Prionellus K., 

 Aprionus K., Monardia K.) ... 3 



3. Antennae composed of from fourteen to twenty-five joints, the 



joints petiolate in the male. . . . Campylomyza. 



Antennae composed often (male) , or six or eight (female) joints, 



the joints petiolate in neither sex. . . Micromyia. 



4. The costal vein reaches to or exceeds the tip of the wing. Catocha 

 The costal vein does not reach the tip of the wing (9) . . 5 



5. Only one vein behind the forked cell. . . Tritozyga. 

 Two veins behind the forked cell (6) . . . . Lestremia. 



TABLE OF GENERIC DIVISIONS (Kieffer). 



CECIDOMYIN^. 



A. First joint of tarsi shorter than the second; wings rounded at ex- 

 tremity; no ocelli. 



B. Wings with squamje on anterior border; claws bifid. 

 C. First two longitudinal veins very close to the costa. 



D. Three longitudinal veins, the first, third and fifth, the 



fifth furcate near the middle. 



1. Proboscis short. . . Lasioptera. 



2. Proboscis elongate. . . . Clinorhyncha. 

 DD. Four longitudinal veins, that is the fifth is divided near 



base of wing. 



3. Thorax attenuated at neck. . Acorhynchus R. 



4. Palpi with one joint. . . Baldratia K. 



5. Palpi with four joints. . . Choristoneura L. 

 CC. Third longitudinal vein, at least, remote from costa. 



E. Empodia simple. 



6. The third longitudinal vein terminates at or near 



extremity of wing. . . . Cecidomyia. 



7. The third longitudinal vein terminates at some dis- 



tance before tip of wing. . . Perrisia Rond. 



8. Flagellar joints with two verticils; alike in both sexes. 



Macrolabis K. 



