A synopsis of the dipterous groups Agromyzinae, Milichiinae, Ochthiphilinae, and Geomyzinae

Middle of face with a pronounced tubercle; anterior fronto-orbital proclinate; calypter entirely devoid of cilia; only the root of the auxiliary vein present, the costal break immediately before the end of the first vein; cheeks comprised largely of the lateral prolongations of the center of the face; mesopleura entirely bare. (North America.) Sinophthalmus Coquillett. Face not tuberculate; anterior fronto-orbital reclinate; calypteres fringed with cilia; auxiliary vein weak, but usually meeting the costa some dis tance before the end of the first vein, at which place normally is located the costal break; lateral prolongations of the center of the face narrow; mesopleure often setulose or bristly 2. 2. Cheeks narrow, less than one fourth the eye-height, the center of the face broader than the cheeks at the vibrissae; arista plumose to loosely pubescent, more than one and one half times the length of the antenna, its basal segment long, the third antennal joint with fine but per ceptible pubescence, especially along the front edge; upper occiput 283