DIPTERA. 44] 
1. Hyalomyia munda, (Tab. XIII. figg. 9, ¢; 9a, head.) 
Hyalomyia munda, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 185°. 
Yellowish-grey ; frontal band, stripes on the thorax, antenney, and legs black; wings yellowish, the costa 
somewhat infuscated, the veins yellow. 
Length 5-25 millim. 
Head whitish ; front yellowish, broader than the eyes; immediately above the antenne a semilunular black 
spot, emitting upwards a narrow black frontal band, which on the vertex is a little enlarged; oral 
margin slightly projecting. Antenne black, the third joint three times as long as the second. Thorax, 
scutellum, and abdomen thickly covered with a yellowish-grey tomentum; thoracic dorsum with four 
black stripes, which are interrupted at the transverse suture; the two median stripes anteriorly con- 
vergent. Abdomen laterally and posteriorly fringed with short pale yellow hairs. Legs shining black ; 
foot-claws and pulvilli elongate, the pulvilli yellowish. Tegule and wings yellowish, the latter with the 
base and costa a little infuscated, and the veins yellow, except those near the tip, which are obscure ; 
small cross-vein before the end of the first vein and beyond the middle of the discal cell ; posterior cross- 
vein in the middle between the small cross-vein and the curvature of the fourth vein; this curvature 
arcuated and the apical cell long-petiolated. 
Hab. Mexico!, Atoyac in Vera Cruz and Rincon in Guerrero (H. IT. Smith). 
Three males. 
2. Hyalomyia villosa. 
Hyalomyia villosa, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 185". 
~ Cinereous ; antenne, four stripes on the thorax, and abdomen black ; legs piceous; sides of the abdomen and 
underside of the posterior femora densely haired; wings yellowish, slightly infuscated towards the tip. 
Length 7 millim. 
Head whitish ; front broader than the diameter of the eyes, in the middle with a broad blackish reflection ; 
beard white. Antenne wholly black; proboscis and palpi brown. Thorax cincreous, with four black 
stripes, the median ones a little converging anteriorly ; scutellum blackish. Abdomen shining black, 
laterally and round the anus densely beset with yellowish hairs. Legs piceous, the knees and the 
posterior tibiee somewhat testaceous ; underside of the posterior femora with a long and dense yellowish 
pile; hind tibiz outwardly with four or five rather long bristles, and on the inner side fringed with short 
black hairs ; foot-claws and pulvilli elongate, yellow, the claws black at the tip. Tegule and wings 
yellowish ; the latter with the veins yellow, except those towards the tip, which are fuscous, and the 
base and the apical portion slightly infuscated ; small cross-vein beyond the middle of the discal cell ; 
posterior cross-vein perpendicular, a little concave and inserted before the middle between the small 
cross-vein and the arcuated curvature of the fourth vein ; apical cross-vein long-petiolated. 
Hab. Mexico}, Orizaba (coll. Bellardi). 
A single male of this species is contained in the collection of the late Professor 
Bellardi, in ‘Turin. 
8. Hyalomyia hebes. 
Hyalomyia hebes, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 183°. 
Yellowish-grey ; antenne, frontal band, stripes on the thorax, abdomen, and legs black; wings greyish, the 
base, costa, and apex infuscated, the veins blackish. 
Length 5 millim. 
Front broader than the eyes, yellowish-grey ; frontal band black, narrow, slightly enlarged towards the 
vertex, sometimes disappearing in a grey reflection; face and cheeks whitish; beard white. Antenne 
black, the tip of the second joint somewhat rufous. Proboscis black; palpi brown. Thoracic dorsum 
