MYCOMYIA. 71 



present they are placed close together in a triangle, the median 

 one very minute ; proboscis very short. Palpi incurved, four- 

 jointed, the 1st joint very small, the 2nd somewhat longer, but 

 shorter than the third, the 4th usually as long as or longer than the 

 three preceding taken together ; face more or less wide. Antennae 

 projecting forward, arcuate, longer than the thorax in the male, 

 subequal in the female, somewhat compressed, 16-jointed, the 

 scape differentiated, the first two joints cupulifonn, setose at the 

 tip ; the flagellar joints cylindrical, pubescent. Thorax highly 

 arched, ovate ; scutellum small, semicircular in outline, metanotum 

 steep. Abdomen slender, seven-segmented, constricted at the 

 base, usually somewhat clavate, particularly in the male, de- 

 pressed behind, "in the male ending in a small forceps, in the 

 female with a short ovipositor terminating in two small lamellae. 

 Legs : coxae elongate, somewhat setose ; legs long and slender ; 

 femora ciliated on the flexor surface ; tibiae with lateral setae, the 

 fore and middle pairs with two, the hind pair with three ranges, 

 the inner row particularly delicate. Wings microscopically setu- 

 lose, somewhat projecting beyond the tip of the abdomen. The 

 oosta ends at the tip of the wing or a little before it. The 

 auxiliary vein ends either free (sometimes indistinctly), or in 

 the costa, or in the 1st longitudinal vein. The 1st longitudinal 

 straight or but little curved, the 3rd beginning at a distinct 

 angle, thence straight or nearly so. The sciophiline cell of variable 

 length according to the species. The 4th longitudinal vein forked 

 at or before the middle of its length beyond the anterior cross- 

 vein; posterior cross-vein absent; 5th longitudinal vein widely 

 forked at about the middle of the wing, the 6th and 7th incomplete 

 and indistinct. 



Range. Europe, the Orient, Australasia, North and South 

 America, West Indies, Africa. It occurs also in Baltic amber and 

 in recent copal from Zanzibar. 



Life-ltislory . Nothing seems to be known of the metamorphosis 

 of any species of this genus, except that the larvae have been found 

 in fungi and rotting wood. 



The species placed in the Sciophila of Winnertz belong here. 

 J^eoempheria, Os. Sac., is hardly a valid genus and is sunk in 

 Mycomyia. Two queried synonyms are culled from Johannsen's 

 work on this family. 



Table of Species. 



1. Auxiliary vein ends free, abruptly ; sub- 



costal cross-vein present Jlaviventris, sp. n., p. 72. 



Auxiliary vein ends either in costa or 1st 

 longitudinal vein ; subcostal cross- 

 vein present or absent 2. 



2. Auxiliary vein ends in costa ; subcostal 



cross-vein present 3. 



Auxiliary vein ends in 1st longitudinal ; 

 subcostal cross- vein absent 6. 



