170 Mr. J. R. Malloch on Eaotic Musearide. 
middle to upper margin ; frons at narrowest part not wider 
than anterior ocellus, widened triangularly above antenne ; 
- parafacial not visible from side; cheek about as high as 
width of third antennal segment ; arista very short-haired ; 
third antennal segment about three times as long as second, 
but not extending to mouth-margin ; palpi slightly dilated. 
Thorax with one or two pairs of presutural acrostichals, three 
pairs of postsutural dorso-centrals, and a minute prealar. 
Abdomen short-ovate ; hypopygium small; fifth sternite with 
a deep, slightly rounded posterior excision, the posterior 
extensions with short setulose hairs. Fore tibia unarmed at 
middle ; mid tibia with one or two posterior bristles; hind 
femur with four or five fine widely spaced bristles on antero- 
ventral surface, and one at middle on postero-ventral ; hind 
tibia with one short antero-ventral and two antero-dorsal 
bristles in addition to the long postero-dorsal one. Veins 
3 and 4 convergent apically, the former ending in wing-tip ; 
outer cross-vein straight. 
Female.—Frons about one-third of the head-width ; orbits 
narrow, lower supraorbital bristle directed forward ; inter- 
frontalia with a pair of cruciate bristles. Mid-tibia with an 
antero-dorsal bristle. In other respects as male. 
Length 4 mm. 
Type, wale, allotype, and one male and female paratype, 
Biserat, Siam, 20-21.x.1901 (4. C. Robinson aud N. Annan- 
dale). 
SoutH-AMERICAN SPECIES. 
Subfamily Paaownrr 2. 
Genus XENOTHORACOCHZTA, nov. 
Generic characters : Female.—Kach orbit with avery long 
strong bristle near anterior margin and two much shorter 
stout bristles above middle; cruciate interfroutal bristles 
absent ; thorax with one pair of presutural dorso-ceutrals 
and no strong presutural acrostichals ;. prealar short and 
stout; prosternum bare; pteropleura and hypopleura 
hairy in part; scutellum with hairs low down on sides ; 
wing-veins bare ; calcar absent. 
Genotype, the following species. 
Aenothoracocheta prima, sp. u. 
Female.——Black, shining, with a slight bluishtinge. Face 
and orbits with whitish pruinescence ; antenne and palpi 
