DIPTERA. 439 
velvety blackish-brown, emitting on both sides a black line, which descends to beneath the vibrisse. 
Basal joints of the antenne rufous; third joint black. Proboscis black; palpi rufous. Thorax clothed 
with a golden-yellow tomentum, with four black dorsal stripes, which are interrupted at the transverse 
suture ; the two median stripes sometimes united and then appearing in the form of a broad black band ; 
the outer stripes more prolonged behind the suture; scutellum ochraceous. Abdomen yellowish-rufous, 
with a blackish dorsal stripe; the first two segments and a narrow lateral border to the following segments 
showing whitish reflections. The black fringe of the hind tibie is short; the foot-claws and pulvilli are 
yellowish, elongate in the male, the claws black at the tip. Tegule and halteres yellow. Wings broad, 
greyish-brown with dark shadows along the veins; the base and the costa to beyond the end of the first 
vein are yellow ; the apical cell is distinctly opened. 
Hab. Muxtco!, Acaguizotla in Guerrero, Atoyac in Vera Cruz (H. H. Smith), 
Santiago Ixcuintla in Jalisco (Schumann). 
Three males. 
3. Homogenia nigroscutellata. 
Homogenia nigroscutellata, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 184°. 
Similar to H. latipewnis, and perhaps only a variety of it, differing in its smaller size and in having the 
scutellum blackish (instead of ochraceous). 
Hab. Mexico !, Acaguizotla and Chilpancingo in Guerrero (H. H. Smith). 
Two males measuring respectively 7 and 9 millim. in length. In one of them (the 
largest) the black dorsal stripe on the abdomen is so broad that the yellow colour is 
limited to the lateral borders; in the other specimen the dorsal stripe is narrow and 
does not reach the end of the abdomen, and the whole surface of the latter has whitish 
reflections. 
ACAULONA (p. 4). 
Acaulona costata (p. 4). 
To the localities given, add :— Mexico, Atoyac in Vera Cruz, Teapa and Frontera in 
Tabasco (H. H. Smith), N. Yucatan (Gaumer). 
Amongst the additional specimens received are several larger females (length 
5-7°5 millim.) agreeing with the description of the male. The black markings of the 
abdomen, however, differ in some respects and seem to be rather variable: in several 
examples there is a continuous black dorsal band and the last two segments are 
wholly of that colour; in others the band is reduced to a row of triangular dorsal 
spots and the last segments are but little infuscated. [Recorded by Mr. Townsend 
(Ann. & Mag. Nat. Hist. (6) xix. p. 28) from Paso de Telaya and San Rafael, on the 
Rio Nautla, Vera Cruz. | 
322 
