130 ME. F. WALKER ON NEW SPECIES OF DIPTEEA 



black, irregularly blackish cinereous towards the hind border ; veins 

 and halteres black ; discal transverse vein straight, parted by nearly 

 its length from the border, and by very much more than its length 

 from the praebrachial transverse vein. Length of the body 2 lines ; 

 of the wings 3 lines. 



Gren. DiscoMTZA, Meigen. 



74. DiscoMYZA TENEBROSA. Mas. Nigricanti-picca, capite piceo gutta 

 testacea, antennis nigris basi testaceis, pectore pedib usque albis, 

 femoribus tibiisque nigro fasciatis, alis nigricantibus apud costam 

 nigris costa valde convexa. 

 Male. Blackish piceous, shining. Head piceous, with a testaceous 

 dot in front ; underside and pectus white. Antennae black, shorter 

 than the face, testaceous at the base; third joint conical; arista 

 plumose. Abdomen not longer than the thorax. Legs white; 

 femora and tibiae with black bands. Wings blackish, black along the 

 costa, which is very convex ; veins black ; discal transverse vein 

 straight, parted by more than its length from the border, and by 

 nearly twice its length from the praebrachial transverse vein. Length 

 of the body 1^ line ; of the wings 2\ lines. 



Descriptions of some JSTew Species of Dipterous Insects from the 

 Island of Salwatty, near New Gruinea. By Eeancis Walkee. 



[Eead March 3, 1864.] 



Fam. MTCETOPHILID^, Saliday. 

 Gren. Mycetophila, Meig. 



1. Mycetophila obscurata. Nigra, nitens, ore coxisque albidis, 

 antennis basi flavescentibus, thorace subcompresso, alis cinereis apud 

 costam nigricantibus. 



Black, shining; mouth whitish; antennfe filiform, yellowish towards 

 the base ; thorax slightly compressed ; legs rather long ; coxae 

 whitish ; hind tibiae with short slender spines ; hind tarsi very 

 - minutely setulose. Wings dark cinereous, blackish along the costa; 

 veins black ; radial vein ending at two-thirds of the length of the 

 wing ; cubital ending at a little in fi'ont of the tip ; subapical forked 

 before the middle ; subanal and anal veins distinct, the former not 

 forked. Length of the body 2 1 lines ; of the wings 4 lines. 



The specimen here described is mutilated ; it may form a new 

 genus. 



