JOURNAL 



JOfId igoph €{nl^onioIogiraI %nmi^. 



Vol. XXI. DECEMBER, 1913. No. 4 



A SYNOPSIS OF THE DIPTEROUS GROUPS AGRO- 

 . MYZIN.aE, MILICHIIN^, OCHTHIPHILIN^ 

 AND GEOMYZIN^. 



By a. L. Melander, 

 Pullman, Washington. 

 (Continued from p. 273.) 



Subfamily GEOMYZIN^. 



Table of the Genera. 



Middle of face with a pronounced tubercle ; anterior fronto-orbital procHnate ; 

 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; mesopleurse 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 ; mesopleurse 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 



