MYDAA.—SPILOGASTER. 319 
Front nearly as broad as the eyes, with parallel sides; frontal band black, bifid towards the vertex; the 
lateral portions of the front whitish; frontal bristles descending to the root of the antenne, the lowest 
pair of these stronger than the others and cruciate. Face and cheeks whitish, the face perpendicular ; 
vibrisse inserted at a short distance above the oral margin; inferior part of the cheeks narrow, with a 
row of bristles. Antennee black, issuing a little above the median line of the eyes; second joint with 
some bristles ; third joint two and one-half times as long as the second and reaching to near the vibrisse ; 
arista with long hairs. Proboscis and palpi black, the palpi cylindrical. Thorax and scutellum cinereous ; 
thorax with four black stripes, the two median stripes posteriorly enlarged and prolonged behind the 
transverse suture, the external stripes less conspicuous and more in the form of spots ; scutellum with a 
black discal spot. Abdomen scarcely broader than the thorax, obscure cinereous, with black reflecting 
spots, which are so extended that the abdomen presents a black aspect ; macrochate present on the anal 
segment and at the hind margin of the third segment. Legs rufous; front femora to near the tip, the 
middle femora at the base, and all the tarsi black; foot-claws and pulvilli short. Tegule whitish. 
Wings greyish-hyaline ; small cross-vein under the end of the first vein and a little beyond the middle of 
the discal cell; third and fourth veins nearly parallel towards the end; terminal section of the fourth 
vein a little longer than the penultimate section (23 : 2); posterior cross-vein slightly curved. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
A single female specimen. 
6. Mydea confinis, sp.n., ¢. 
Cinereous; head whitish; thorax with four black stripes; antenns and legs rufous, the tarsi and palpi black. 
Length 6 millim. 
Allied to the preceding (M. leucocephala), and agreeing with that species in most of its characters; but 
differing from it in having the antenne rufous (except the basal joints, and the tip of the third joint, 
which are somewhat brownish), the vibrisse inserted exactly at (not above) the oral margin, and the eyes 
descending almost to the underside of the head, the femora also being entirely rufous. The wings have 
the third and fourth veins somewhat more divergent; the terminal section of the fourth vein is longer 
in proportion to the penultimate (3: 2); the posterior cross-vein is nearly straight. 
Hab. Mexico, Orizaba (Ff. D. Godman). 
A single female specimen. 
SPILOGASTER, 
Spilogaster, Macquart, Suites 4 Buffon, Dipt. i. p. 293 (1835). 
The species of this genus agree in most of their characters with those of the 
preceding (Mydea), but differ from them in the more elongate, sometimes conical, 
shape of the abdomen (especially in the males), and in the distinct blackish spots on 
it, usually two on each of the second and third segments. 
The following species from Central America are represented in the collections before 
me :— 
1. Abdomen with triangular dorsal spots . . . . - . . . trigonata, v. d, Wulp. 
Abdomen with four rounded spots on the second and third 
segments . . . 2 
2. Wings without blackish markings . . . 
Wings with blackish markings on the cross-veins . . . . . 5. 
os 
