222 LONCHOPTEBID^E. 



Proboscis distinct. Cheeks bristly. Eyes distant. Tip of t-he wing 

 pointed; cubital vein simple ; discal areolet wanting ; axillary lobe obsolete. 



Genus I. LONCHOPTERA. 



LONCHOPTERA, Mg. ill. mag. (1803); Mq.; Ztt.; Ct. 



Corpus angustum, lineare, raro setosum. Oculi valde conspicui. 



Antennae articulo tertio suborbiculato, compresso ; quarto tertii 



apice insidente ; sexto longo, setiformi, pubescente. Alae angustee. 



Pedes cursorii. 



Body narrow. Head transverse, almost oval, as broad as the thorax, 

 somewhat lengthened beneath ; front broad, rather flat, beset with a 

 few long stout bristles ; epistoma nearly straight, short, depressed, con- 

 tracted, bristly on each side ; peristoma round, large, bristly on the 

 border. Proboscis hardly projecting, tumid at the base. Labrum 

 stout, sublinear, obliquely acuminated, as long as the labium. Lingua 

 setiform, very slender, half the length of the labium. Maxillas none. 

 Palpi large, clavate, flat, pubescent on the fore border. Labella narrow, 

 elongated, somewhat hairy. Antennaa 6-jointed, porrect, remote at 

 the base ; third joint broad suborbiculate ; fourth and fifth very short ; 

 fourth apical ; sixth long, setiform, pubescent. Thorax oval, bristly ; 

 scutellum transverse, semielliptical. Wings lanceolate, narrow, finely 

 pubescent, without the usuid transverse veins, incumbent, flat and 

 parallel in repose ; pra3brachial vein forked ; alula3 very small. Halteres 

 uncovered, with large oval knobs. Abdomen with 6 segments, long, 

 linear, depressed ; first segment largest. Legs long, bristly, formed 

 for running ; claws and onychia small. 



Male. Anal vein of the wing joining the hind border. Sixth abdo- 

 minal segment curved beneath, with two hairy lamellaB. 



Fern. Anal vein united to the pobrachial vein. 



The veining of the wings may be compared to that of Opetia ; 

 but the prsebrachial vein appears displaced, an oblique transverse 

 vein arising in its place and running to meet the cubital near its 

 origin, while the prsebrachial arises from the pobrachial far beyond 

 this, and is soon after parted into two branches. If the wing be 

 viewed in a particular light, however, a fold of the membrane is 

 visible in the usual place of the prsebrachial vein at its base, as if 

 this portion were obliterated, and the vein, where it commences 

 distinctly, bent back to join the following. The anal vein takes 

 its rise nearly as in Opetia, but in the female it runs in a curve 

 to join the pobrachial vein before the margin. The short sub- 

 costal vein is minutely pectinated, as are also the pobrachial and 



