1394.1 71 



Gen. ch. — Eyes nude ; fronto-orbital setce in a single row in the male, and 

 partially double in the female ; facialia bare ; antenna with the second joint a little 

 prolonged, and the third from two to three times as long ; arista with the second 

 joint distinct, but very slightly prolonged; proboscis narrow and pointed j abdomen 

 oblong, with both discal and marginal setse; wings with the fourth vein bent in a 

 curve or very obtuse angle, and having the veins more or less setigerous. 



1 (2) (3) Wings with the first, third, and fifth veins setigerous... 



1. frontata, Bohem. 



2 (1) (3) Wings with the first and third veins setigerous 2. spreta, Mgn. 



3 (1) (2) Wings with the third vein only setigerous 3. cinerea, sp. n. 



B. FEONTATA, Bohem. 



B. spreta, Mcq. and Dsv. 



Myohia discrefa, End. 

 In this species the palpi ai'e rufous or piceous (not black, as I stated in my list) 5 

 the antennae are more or less rufous at the base, especially in the female ; the frontal 

 stripe is red or brown ; the arista is thickened nearly to the middle ; the first and 

 second abdominal segments are rufescent at the sides, and the wings have the 

 auxiliary branch of the first, with the third and fifth veins, setigerous, and in some 

 specimens a fevr setse rafe also scattered along the middle portion of the fourth vein. 

 Not uncommon. 



B. SPEETA, Mgn. and Sclinr,, non Dsv. et Mcq. 



This species closely resembles B. frontata, but differs by having the palpi 

 black, as well as the frontal stripe and antenna ; the wings also have only the first 

 and third veins setigerous, the setae being continued along the latter to a little 

 beyond the inner cross vein. I have only seen one specimen of this fiy, which 

 was captured by Mr. Coryndon Matthews in S. Devon. 



B. CINEEEA, sp. n. 



Male, cinereous ; frontal stripe about one-fourth of the width of the head ; 

 centra] stripe rufous, and rather narrower than the sides, which are whitish-grey ; 

 fronto-orbital bristles in single row extending to nearly the end of the second 

 antennal joint ; face white ; cheeks bare and divided from the chin by a deep rufous 

 groove ; chin liairy ; vibrissas few, one long and strong one only, exactly opposite 

 the side of the epistome, which is ratlier prominent; antennae grey, with apex of 

 second joint a little rufous; third joint rather more than double the length of the 

 second ; arista with the first and second joints short, but quite distinct ; the third 

 thickened for about one-third of its length, and pubescent at the base ; palpi yellow ; 

 proboscis narrow and pointed. Thorax pale grey, marked with four stiipes, two 

 central ones very narrow, but distinct, two lateral ones indistinct and broken ; in 

 certain lights three rather broad stripes are visible, placed near together; posterior 

 external dorso-central setee three in number ; scutellum yellowish-grey, immaculate, 

 with yellow apex ; abdomen conical, grey and immaculate, except for a number of 

 minute black spots, on which the hairs and bristles are seated, the latter are both 

 marginal and discal; calyptra white, haltercs yellow; wings clear, with yellow 

 roots ; apieal cross vein forming a long and gradual outward curve from the base 



