220 DOLICHOPIDiK. 



Moutli largo, prominent, black. Thorax with tlirce brassy-brown 

 stripes, slightly hairy on each side. Wings hyaline ; cubital and pr?e- 

 brachial veins approximatnig towards the tip ; transverse discal vein 

 rather long, inclining towards tire interior margin ; pobrachial vein 

 inclining beyond the transverse vein to the hind border, which it does 

 not attain ; axillary alula; and halteres whitish. Legs black, naked, 

 unarmed ; knees ferruginous ; hind fcmoi'a pubescent on the outer 

 side. Male. Hypopyglum rather smaller than that of M.jacidas. 

 Not rare. (E. 1.) 



Genus XV. APHROSYLUS. 



Antennae articulo tertio ajjlce attenuato, arista apicali. Proboscis incur- 

 va, apice wujidculata. Vena transversa propc ynaryinem ales. Hypo- 

 pi/gium inaris subglobosum, laynellis geminis injlexis. Coxes anticce 

 muricatce. 



Antennm with the first joint naked, second transverse, the third joint 

 attenvaled to the tip ; arista apical. Occiput convex, with a pale beard 

 behind the lower orbit. Eyes pubescent, distant on the front, ap- 

 proaching closely below the antennae in the male at least. Palpi pro- 

 truded, oval, very large in the male. Proboscis shorter than the head, 

 conical, somewhat compressed, incurved towards the prosternum, 

 receding from the palpi, and armed at the tip toith a short stout 

 sjnne (the projecting extremity of the tongue). Wings oblong, the dis- 

 cal transverse vein distant by much less than its oicn h'ngth from the hind 

 margin, the subapical vein nearly straight and parallel with the cubital. 

 Abdomen finely pubescent, with the first segment not longer than the 

 second ; in the female, of five segments and somewhat conical ; in the 

 male, of six segments, a little compressed behind, rounded at the tip, 

 and enlarged by the protuberance of the hypopygimn ; this is nearly 

 globose, deflected, furnished at the tip beneath tvith two broad injluted 

 lamellce, and some slender appendages between them. Legs long; the 

 outside of the tibiae, and the femora towards the tip, armed with some 

 spines ; the whole anterior surface of the fore coxfe and the under side 

 of the fore trochanters beset with spines ; the fore tibia armed with a 

 strong spine or spur at the tip inside ; the third metatarsus longer than 

 the following joint ; the onychia more thickened to the tip with pubes- 

 cence than is usual in this family. 



The form of the head, the antennBe, and the direction of the 

 proboscis, resemble some of the EmpidcB, as the genus Chersodro- 

 mia. In tlie general form and the wings, the strongest likeness 

 is to Ihjdrophorus, and the fore legs are armed yet more formidably 

 than in that genus. The known s])ecies both i're(|uent the verge 

 of the sea. 



