DIPTERA. 315 



at the sides, this colour extending inwards on their posterior part and reaching nearly across the terminal 

 ones. Legs wholly deep hlack, with light- coloured hair and bristles; hind tibiae somewhat thickened. 

 Wings tinged with brown ; fourth posterior cell only a little, or not at all, contracted at the margin ; anal 

 cell open. Length 7-8 millim. 



Hob. Mexico, Venta de Zopilote in Guerrero (H. H. Smith). 



Seven specimens. This species is allied to C. (INicocles) scitula, Willist., and 

 C. {Aphamartania) fur, Willist., but will be at once distinguished by the brownish 



wings. 



3. Cophura humilis, sp. n. 



<$. Black. Face densely white-pollinose, when seen from the side; hair white. First two joints of the 

 antenna of nearly equal length ; third longer than the first two together ; style slender, shorter than 

 the second joint. Sides of the occiput white-pollinose. Mesonotum opaque ; median stripes obscure ; 

 on the sides and behind with golden tomentum. Abdomen brownish-black, a little shining, the narrow 

 hind margins of the segments somewhat reddish. Legs black ; knees and basal portion of all the tibice 

 yellow; tarsi in large part yellowish: hind tibiae not clavate; hind metatarsi moderately thickened. 

 Wings deep brown on the basal two-fifths or more, nearly hyaline distally. 



$ . Abdomen deep red or brownish-red ; wings less extensively hyaline at the tip. Length 8 millim. 



Hab. Mexico, Tepetlapa in Guerrero (//. H. Smith). 



Two specimens, the female being greasy. The description of Dasypogon humilis, 

 Bell., applies pretty well to this species, but there is no spur on the front tibiae (%). 



PSEUDORUS (p. 183). 

 Pseudorus bicoior (p. 183). 



To the localities given, add : — Mexico, Acapulco and Amula in Guerrero (H. 11. 

 Smith), Santiago Iscuintla in Jalisco, Atoyac in Vera Cruz (Schumann), Omealca 

 (if. Trujillo). 



Thirteen specimens. The thorax is shining black, the wings uniformly deep brown. 

 In structure this species agrees well with P. piceus, Walk., examples of which I have 

 examined from Brazil ; both have the marginal cell closed and but two submarginal 

 cells. 



ATOMOSIA (p. 183). 



Atomosia mucida (p. 184). 



To the locality given, add:— Mexico, N. Yucatan (Gaumer). 



A male specimen. This species is a true Atomosia, notwithstanding the unusual 

 length of the antenna?. The front is narrow above; the first posterior cell is narrowed ; 

 and the hind tibiee are brown at the tip. 



2 s 2 



