FAMILY CECIDOMYIIXE THE GALL MIDGES 109 



39. Antennae with fourteen or more segments 40 



Antennae with ten to thirteen, rarely with fourteen segments 43 



40. Third vein uniting with the costa at or near the apex of the wing. ... 41 

 Third vein uniting with the co.sta well before the apex of the wing. . . 42 



41. Ovipositor not chitinized apically; claws with one sti'ong tooth (19). 



Rhabdophaga Westwood 

 Ovipositor chitinized apically, blade-like, the claws weakly toothed. 



Procystiphora Felt 



42. Wing veins scaled, the membrane more or less brownish. 



Lasiopteryx Stephens 

 Veins not distinctly scaled, the membrane hyaline (20). 



Dasyneura Rondani 



43. Third vein uniting with the costa near the apex of the wing 44 



Third vein uniting with the costa well before the apex of the wing. 



Neuromyia Felt 



44. Antennfe with thirteen or fourteen segments Cystiphora Kieffer 



Antennae with twelve segments, genital harpes sickle-shaped, greatly 



produced Harpomyia Felt 



45. Palpi with two or three segments 4^! 



Palpi with only one segment Ficiomyia Felt 



46. Palpi with three segments 4S 



Palpi with two segments 47 



47. Antenna; with twelve segments Coccidomyia Felt 



Antennae with fourteen to eighteen segments Diarthronomyia Felt 



48. Claws with a single tooth 49 



Claws pectinate Ctenodactylomyia Felt 



49. Ovipositor with apica! spine; male clasper short, swollen. 



Cystiphora Kieffer 

 Ovipositor without apical spine; pulvilli nearly three times as long 

 as the claws Allomyia Felt 



50. Flagellate antennal segments cylindrical, not greatly elongated, usu- 



ally stalked in the male; ovipositor not aciculate 51 



Flagellate segments cylindrical, elongate, sessile; ovipositor usually 

 aciculate 56 



51. Palpi with one to three segments 53 



Palpi with four segments 52 



52. Third vein joining the costa at or near the apex of the wing (34). 



Phytophaga Rondani 

 Third vein joining the costa well before the apex of the wing. 



Janetiella Kieffer 



53. Ovipositor distinctly chitinized, aciculate or cultriform. 



Sackenomyia Felt 

 Ovipositor not chitinized 54 



54. Palpi with only one or two segments 55 



Palpi with three segments Oligotrophus Latreille 



55. Pulvilli nearly twice as long as the empodium Walshomyia Felt 



Pulvilli shorter than the empodium Rhopalomyia Riibsaamen 



