CAMPSICNEMUS. 187 



reus var., Flu. C'mereus, arista decurva, hypostomate albido, Mas. ; aid 

 flavido, Teem. Long, \\fcem., \\ mas.; alar. 5,/., G, vi. 



Cinereous. Face broad, dull loJdtish in male, yellowish in female; 

 beard yellowish. Anteiiute with the tooth beneath the tip of the third 

 joint obtuse ; arista decurved, the outer half capillaeeous and rather 

 pale, the penultimate joint short in proportion. Bristles of the thorax 

 short, only two on the scutellum, three at each side of the prosternum. 

 Wings smoky-hyaline ; the veins dusky ferruginous, the costal margin 

 appearing faintly pectinated from the scanty pubescence. Halteres 

 yellow, with the apical edge a little darker. Abdomen with a faint 

 brassy tinge, the pubescence pale. Lamella not exserted. Femora 

 and tarsi beneath, fore tibia in front, hind tibia at the tip behind, with 

 yellowish pubescence. Fore legs very short ; coxa; with a few spines 

 about the tip, and sometimes one or two at the base ; femora bipec- 

 tinated beneath ; tibia strongly pectinated in a single row inside ; in 

 the female there are a few longer spines in a second row behind, and 

 some more on the outside ; tarsus longer than the tibia. 



Abundant, on the verge of the tide, in sheltered bays ; but not 

 exclusively confined to the salt water. (E. S. I.) 



Ohs. Macquart's brief character of M. mcBqual'qoes (dipt, ii. 

 453. 5) scarcely affords sufficient grounds for identifying that 

 with the present species ; but the synonym from Zetterstedt is 

 unquestionable. 



Genus VI. CAMPSICNEMUS. 



Camptosceles, Hal. z. j. v. 357 (1S31). Medeterus, Wlbg. Mede- 

 teriis \).,'b,l.g.; Mq. BoUcJiopus ]).,^\q..; Roser; Ztt. 



AntenncB articulo iertlo apice attenuato, arista dorsali. Hypostoma an- 

 (jnstissimum. Abdomen depressum, seymentis anteriorihus (squilonrjis. 

 Hypopyyium immersum, muticum. Vena transversa a margine distans. 

 Eyes pubescent, distant on the front, approacJuny very close under the 

 antenna (or even contiguous in the male) . Supercilia black ; cilia of 

 the lower orbit usually pale; (except sp. 5.) Proboscis but little pro- 

 minent. Antennce rather short ; tcith the first joint naked ; the second 

 shortest, transverse, verticillated ; the third joint tapering ; arista dorsal, 

 slender, nearly naked, the penultimate joint short. Scutellum with 

 two long bristles ; prosternum with a slight one at each side ; meta- 

 thoracic epimera not dilated, but much elongated obliquely dowmcards. 

 Wings oblong; discaW/'flwswrse vein distant by ahovii twice its own 

 length from the hind margin ; subapical vein usually parallel with the 

 cubital, and nearly straight, except that before the middle it traverses 

 a round convexity of the membrane. Aluhie sparingly fringed with 

 black hairs. Halteres usually yellowish. Abdomen not longer than 



