LTPONKnnD.lv 19 



12. Auxiliary vein very long, teniiinatiiiii- in the Cdsta. 



Xeoglaphykoi'tkha Osteii Saeken. 



iVuxiliary vein short, or, if hjiii;:, eiidin.u in the first vein. . . lo 



i;]. Furcation of tlie fiftli vein opposite or hefore llie anterior eros.s-vein, 



and more ])roxinial tlian that of the fourtli vein. ... 14 



Furcation of tlie fifth vein more distal than the anterior cross-vein or 



the furcation of the fourth vein. ...... 15 



14. Auxiliary vein reaching beyond the middle of the first basal cell. 



TniciiONT.\ Winnertz. 



Auxiliary vein sometimes rudimentary, or not reaching to the nuddle 



of the first basal cell K! 



15. Furcation of the fourth vein o]ii)osite or before the first section of the 



third vein; posterior f(jrked cell long and narrow. 



]\HVMOSiA Winnertz. 



Furcation beyond the first section of the third vein. Allodia Winnertz. 



IG. Posterior forked cell narrow. . . . ^Ivcotiieka Winnertz. 



Posterior forked cell broad, the branches divergent. Ivxicoiiia Winnertz. 



3. LIPONEURIDiE. 0^ fd^o.f^a/^^ 



Moderate sized, elongate, bare si)e('ies with broad wings and 

 long legs. Both sexes holoptic or dichoptie ; three ocelli pres- 

 ent ; proboscis elongated ; antennae slender, composed of from 

 six to sixteen joints, clothed Avith short pubescence. Thorax 

 with a distinct, broadly interrupted, transverse suture. Hypo- 

 pygium jjrojecting; ovipositor witli two short, rather obtuse, 

 lamella. Legs moderately slender, the hind pair much longer 

 than the anterior ones. Empodinin very small, almost rudi- 

 mentary ; pulvilli wanting; wings broad, bare, witli a mark- 

 edly projecting anal angle; peculiarly characterized from all 

 other flies by a secondary, extremely hne, spider-like network. 



The family Blepharoceridce or Lipoiicurithe was established 

 by Loew in ISGO to include a half (h)zen sjx'cies, wliicth could 

 not well be located in any of thi^ existing families. Since that 

 time the number in the family has been increased to about sev- 

 enteen known forms, distributed in nine genera. Six of these 

 species ttre found in Europe, one in Asia., six in Nortli America, 

 one in the AVest Indies, and tliree in South America.. Tlie 



