U BRITISH FLIES 



DIPTERA OETHOEEHAPHA BKACHYCEEA. 

 Taiie of Super/amiJies and FamiUcs. 



1 (12> Three equally well developed pad-like puhnlli (fiir. o4\ Species 



absolutely eremoehsetous.* EREMOCHJETA. 



Third joint of the antenn* ustuUIt annulated. and when a style or 

 aristii is present it is apicsd or suWpical. Anal ceil always long but 



closed, or. at any rate, contracted nejir the wing- 



mfiTgin : cubital rein almost always forked : 



.«<«% : "orth posterior cell seldom closed : thoracal 



-^5;^^ ^^ V ^ often large. Species sometimes blood- 



^^^ .i __' ' - /..I... but never predaceous in the perfect 



vj^^' s^ate. 



^ ^ --------- jjj^j. (^,(»^jjp jj^ follows: the };1- 



villi m.v Jiy two in number (L'lmprom't ' . 



c>r may be obsolete {Cftnof-ham^. etc.) : the 

 femora more or less serrate beneath the hind 

 Tiair iXf/fomi/ia, etc.), though the term eremo- 

 ~ should be taken as strictly applying to 

 -._. :--:rax and scuteUum only; the antennal 

 ;msTa appiarently only subapical or even sub- 



tphoromt/i'i, etc.), and 



^-^ --. „ . : : .11 annulated {Lrj'tiJa-, 



etc): the anal c-ell only moderately long {BtrU, 



- -'- robital vein simple (Pa<:/<y<?a-«f^r sp.. Xemot'dus sp., Ort/rei-a 



"iorjJta^ Cyrtidif, etc), and the fotirth posterior cell dosed 



\^JLjfiomyia, AoamUuomterid'ce, etcX 



2 (11> Wing-veins never nmning parallel with the hindmai^in of the 



wing, but all tbe veins near or after the wing-tip running out 

 almost straight to the wingmargin. 



The veins nay t»eoome faint, carved- and incomplete (Stratiom>t.K 

 etcX <»■ obsdete (Cyrtid':f\ or if they do run almost parallel with the 

 hindinaTgin (as in some Cyrfid-T^ i the thoracal d^namae then are 

 enormous. 



3 (8> Thoracal squama small or olisolete, or if radier large (Straiiomys, 



etc.) then covered on both upper and under surfaces with 

 woolly pubescence, and the abdomen not balloon-like as in the 

 Cyrtida:, and the fork of the cubital vein very short and 

 wholly placed far before the wing-tip. 



4 (5> Ambiemt vein-*- absent or incomplete, though sometimes {Berinae 



and JTylcmyima-) the costal vein is continued for a short 

 distance after the end of the cubital vein ; prsefurca ^ starting 

 almost oppo6ite the base of the discal cell except in the 



atedhBjieCj vitfant sSraas liiiril i i «■ ike hod «r thanr, as 

 nms an msBd the kisdaBargjit of tke 



