BRITISH FLIES 



15 



eoflla and tbe 

 the wing-tip i^.--- 

 L^3 nttiier short aji 

 Idle Xificmyhh' 



:ai sowded feogetitar near tiie 



-t: eaMlal fork enEErelT before 



- .- anal eell alwajs closed. 



- ■^nhijuli spurs, except in 



(flagelliim) alwava annolaiieii. Si-turellniQ. ofcen anneii with 

 mairginal spine- T't " - - ' - :irver eksgate or hariLj. Perfect 

 inaeets never t^yj'j-j.-^^^^.s^'z^i. L STSAiroiniD^i. 



nsi. 3Sl — ^rvtiamgs patmmAIiK 9- ''■3. 



a> 



The Straticmyidce are large to x^th.- '! ffiesy more «• less 



flattened, and •with, the wings when at les: . jaraHel aad ^t on 

 each other on the flattened abdomen. Tli^ eoiocrs are ix^aallT blaek 

 with orange oc whitish mariingSy bat all the T^tn>"h Sir'nnije are 

 brilliant^ shining green. They may (witi tlie exception of the 

 Xyiomyiti iistxDgnkJied fsam dH ti»e ^^kearetie BSachtceejl 



(except a i . ridee) by the siKKt pg a if un a y wliidi starts OCT*>»ite to. 

 instead of considerably bef i»e, the base of the diseal eeD. 



The Xyicmyincf are scHnevhat ab«f: - .addois^ ' " 'r the 



Xylophagim€e{Leptidir)ia.TaxixY tiisaAt:-.- - - i astir ^raarc- 



ing considerably before the bai^ of the diseai ceB. the contmodjioe Tf 

 the costal rein as an ambient T^n to the end of the - - ' --:-■- fj^Qj 

 the discal ceD, the ^lape of the discsJ cdl and eabi: .ned 



p«Tsteiior tibi», and the sometimes seinilate hind P oKiy 



be distinguished from, the JTw^'ViA'i'nss^ir br the €l< .-. .. . -. rt*ir 



cen. - . . 



Ambient vein complete even if faint; anterior veins never 

 crowded together near the costa : enbital fork almost always 

 enclosing the tip of the wing, or at anj rate (wh^i present) 

 very nearly doing sa Tibi* always more or le^ spurred. 

 Scntellnm very rarely armed \Ccta&myia\ 



6 (7) Gigantic flies. Third anrennal joint always annulated. 

 a short indistinct spur on the middle pair only 



TSbiiie with 



Prtefurca 



starting only a short distance before the base of the discal cell : 



