DIPTERA. Sol 



yellowish-grey pollen ; bristles of the mesonotum not reaching before the middle, black ; median stripe deep 

 coffee-brown, the oval, elongate, lateral spots less evident. Scutellum with two bristles. Abdomen nearly 

 opaque, brownish-yellow, without bristles before the hind margins of the segments ; hypopygium of the 

 male deep reddish, not clubbed. Legs deep red ; front and middle femora above, and the distal joints of 

 the tarsi, with black hair, elsewhere covered with thick- lying, short, white hair ; femora broadly black in 

 front; tarsi blackish towards their extremity; hind tibias on their outer side blackish; all the femora 

 rather stout, the front ones without bristles below. Wings tinged with brownish, the clouds at the 

 distal extremity and posteriorly inconspicuous. Length 15-16 millim. 



Hab. Mexico, Omilteme in Guerrero 8000 feet (//. H. Smith). 



Six specimens. The abdomen, seen obliquely, appears to have lighter-coloured 

 bands on the posterior part of the segments ; there is a narrow blackish stripe along 

 the middle. 



12. Asilus (subgen. 1) lestes, sp. n. 



2 . Vertex deeply excavated. Facial gibbosity moderately prominent, but reaching two-thirds of the distance 

 to the root of the antennae ; mystax white, with black bristles on the upper part of the convexity. Face 

 and front opaque, nearly white. Beard and occipital bristles white. Antennae black ; third joint short- 

 oval, about as long as the first, and one-half the length of the slender arista. Thorax opaque white, the 

 mesonotum a little yellowish ; the usual markings brown. Scutellum with two bristles on its margin. 

 Abdomen uniformly opaque grey, with a small brownish spot on the middle of each segment. Legs 

 reddish-yellow ; the femora, except at the base and tip, shining black ; tips of the tibiae and the distal 

 joints of the tarsi blackish ; femora stout, the front ones with a few bristles below. Wings hyaline, 

 wholly without clouds at the tip and posterior part ; proximal end of second submarginal cell more distal 

 than that of the second posterior cell. Length 10 millim. 



Hab. Mexico, Chilpancingo in Guerrero (H. H. Smith). 



Two specimens. The first segment of the ovipositor is elongate, with nearly parallel 

 sides ; the second segment is short and broad. 



OMMATIUS (p. 210). 



Ommatius peregrinus (p. 210). 

 To the locality given, add : — Mexico, Xucumanatlan in Guerrero 7000 feet (II. H. 

 Smith). 



A single female specimen. The hind femora are black along the underside, the 

 ring on the hind tibiae is indistinct, and the colour of the face is apparently less golden 

 than in the Panama type. Nevertheless, from the great variability that seems to be 

 characteristic of the species of this genus, I think that the Mexican insect is identical 

 with that described by Osten Sacken. 



2. Ommatius ? 



Hab. Mexico, Amula, Omilteme, and Tepetlapa in Guerrero, Teapa in Tabasco 

 (H. H. Smith), Atoyac in Vera Cruz (//. H. Smith, Schumann), N. Yucatan 

 ( Gaumer). 



2u2 



