I40 AN ACCOUNT OF BRITISH FLIES. 



S. trili/ieata, Zett. Ibid., xiii. 734, 27. 



S. incisurata, Zett, = S. amndata, Mg. Ins. Lapp., 859, 7 

 (1840). Zett. and Zw., i., 247, 4 (18 18). Meigen. 



Section 4. — Ceroplatince . 



Antennae 17-jointed, not very long. Ocelli three, middle one 

 small. Thorax elliptical. First longitudinal vein short ; third, fourth 

 and fifth veins forked ; brachial vein short. Body long and narrow ; 

 eight segments. 



A. Mouth elongated like a beak. 



cTipiila., F. 

 Genu.s Asindulum, Ltr. ^ J F/atyura, Zett. 



\.Macrorrhy7tcha, Wtz. 



The insects of this genus are slender, and their bodies are long. Head 

 (Fig. 17A) oval and depressed in front; vertex convex; front broad. 

 Eyes oblong ; ocelli three, middle one small. The mouth is produced 

 into a short rostrum : the proboscis is long and bifid, elongated lips. 

 Palpi 4-jointed ; first joint small, third and fourth fairly long and 

 nearly equal. Antennse : first and second joints cyathiform, re- 

 mainder cylindrical, except seventeen, this is conical; hairy. Abdo- 

 men cylindrical, eight segments ; in $ the abdomen is subfusciform ; 

 hypopygium small. Legs long and slender; hind femora stout and 

 bare ; hind tibiaj have minute lateral spines ; spurs well developed. 

 Wings minutely pubescent, parallel in repose ; first longitudinal vein 

 short, second ending much beyond half the length of the wing ; fourth 

 longitudinal, forked near its base, fore-fork ending just behind tip of 

 the wing ; fifth forked nearer base of wing, its fore-fork connected by 

 a transverse veinlet with the third longitudinal vein before the fork of 

 the fourth ; the sixth and seventh veins short. 



The metamorphosis is not known, but Winnertz* reared them 

 from rotten wood. (A. flavum). 



A.Jlavu?n, Wtz. = F. rostra ta, Zett. 



The imogo is yellow. The thorax yellow, with three brownish 

 stripes running longitudinally, clothed with black hairs. Proboscis, 

 palpi and antennae blackish -brown. Abdomen brown in the ^ ; 

 first and second segments yellow ; sixth, seventh and eighth black ; 

 hypopygium light brown to yellow. In the ? the abdomen is pale 

 brownish-yellow ; third, fourth and fifth segments with black sutures ; 

 the seventh and eighth black; ovipositor light brown. Legs pale 



* Slett. Knt. Zeit., 1S46, p. 18. 



