1 1 6 AN A ceo UNT OF BRITISH FLIES. 



(fourth) a little before middle of wing. It forms an angle with the 

 transverse veinlet, and then passes straight to the margin, a little in 

 front of the tip of the wing. The sub-apical (fourth longitudinal 

 vein) is forked. The remaining vein — the sub-anal (fifth longitudinal 

 vein) — is forked in some ; in others simple. Anal (sixth longitudinal 

 vein) does not reach margin, and varies in length. There is also a 

 small veinlet (humeral) near the base of wing. Base of fourth 

 hind anolet ?iearfy ifi a tratisverse line with that of the second 

 hind areolet. Legs slender ; coxce long ; the four hind tibice spinose, 

 with two long spurs ; only one spur on fore tibire and spines scanty. 

 Tarsi longer in fore legs than hind. The curious formation of the 

 legs, which are adapted to their hopping and skipping move- 

 ments, are very characteristic, and resemble the legs of Pulex. 

 The larvae of this genus have been mentioned in the general 

 account, and so we can now pass on to some of the species found in 

 this genus. The genus, as taken by Walker, included about fifty-one 

 species ; but the old genus Myceiophila is usually divided into 

 several distinct genera or, more correctly, sub-genera. The differ- 

 ences between Alycetophila and Rymosia and Exechia are, for 

 instance, very slight, and although they are separated off as distinct 

 genera, in my opinion the characters are not sufficiently marked to 

 justify them being raised to that position. 



Fig. 2^.--Mycctophila cingtihim* Mg. 

 M. punctata, Mg. = - 



' M. striata, Wlk. 

 M. senticincta, Mg. 

 M. cujictans, Wied. 

 M. rufa, Macq. 



This is a large and common species (2^ lin. long, 4-5 lin. alar). 

 The general colour tawny. There are three large reddish spots on 



* M. cinonlnni,Mg. This is a testaceous species, with tawny abdomen. Wings 

 also tawny in front, marked as in Fig. 23. Not very common. Length lA to 2 lin. 



