XIII. FAMILY 



Fig. 51. Lefilis tnystacea, enlarged. After Washburn. 



Species of moderate or large size, more or less elonga- 

 ted, usually thinly pilose or nearly bare, without distinct 

 bristles. Males holoptic or dichoptic. Empodium de- 

 veloped pulvillifonri*, the pulvilli present (figure 14). 

 Squamae small or rudimentary. Antennae very variable: 

 ( i ) the flagellar joints distinct, as many as thirty in 

 number (20); (2) the segments not more than eight in 

 number, more closely applied, without style or arista 

 (13); (3) fewer in number, with a differentiated, seg- 



* Hilarimorpha, (1, 2), which is included in this family by most 

 writers, has vestigial empodia and no discal cell. The tibial spurs, also, 



are very small. 



157 



