cecidomyim;. 



127 



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

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



LESTREMIN^. 



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- 



romyia K., WasmaniellaTL., Bryomyia 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). 



CECIDOMYINjE. 



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

 tremity; no ocelli. 

 B. Wings with squamae 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. 



