152 DIPTERA. 
segment with similar macrochete on. the disc. Legs black’; middle tibiee with some long bristles; hind 
tibiee outwardly with a row of short bristles. Tegule whitish. Wings hyaline, with a dilute greyish tint ; 
small cross-vein on or just before the middle of the discal cell; curvation of the fourth vein with a blunt 
angle; apical cell narrowly opened at a short distance before the wing’s tip ; apical cross-vein oblique and 
straight; posterior cross-vein slightly sinuous, insérted beyond the middle between the small cross-vein 
and the curvature of the fourth vein. © mors 
Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith). 
A single female specimen. 
3. Degeeria basalis, sp. n., 2 .. 
Black; head greyish; thorax anteriorly cinereous, with four black stripes; abdominal segments with whitish 
front borders; palpi rufous; hind tibia with bristles of unequal length ; wings infuscated at the base ; 
posterior cross-vein nearer to the curvation of the fourth vein than to the small cross-vein. 
Length 3°5 millim. 
Front cinereous, distinctly broader than the eyes; frontal band brown, broader than the lateral portions ; frontal 
bristles on each side in a single row, descending as far as the end of the second antennal joint; vibrisse 
inserted a little above the oral margin. Antenne black, shorter than the face ; second joint bristly ; 
third joint nearly four times as long as the second; arista thickened to the proximal half. Proboscis 
black; palpi pale rufous, blackish at the base. Thorax before the transverse suture cinereous, with four 
rather broad black stripes; pleuree somewhat cinereous. Abdomen ovate, shining black; second and 
following segments with well-defined yellowish-white front borders, which laterally are broader and in 
the middle interrupted by a narrow black dorsal line (in the second and third segments the whitish colour 
occupies no more than a fourth or a third of the length of the segments, on the anal segment it is 
extended to more than the half); all the segments with long marginal macrochete, the second and 
third with short discal ones also ; the anal segment with many long black hairs. Legs black ; underside 
of the hind femora with long bristly hairs; middle tibia with some long bristles; hind tibiee outwardly 
with several bristles of unequal length. Tegule yellowish-white, Wings grey, their base (to the end of 
the first vein and to the small cross-vein) brownish; small cross-vein distinctly before the middle of the 
discal cell; curvature of the fourth vein with a blunt angle; apical cross-vein very slightly concave ; 
posterior cross-vein nearly straight, inserted beyond the middle between the small cross-vein and the 
curvature of the fourth vein. 
Hab. Mzxico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
A single female specimen. 
4. Degeeria hyalinipennis, sp. n., ?. 
Head whitish ; thorax cinereous, with black stripes ; abdomen shining black, with narrow white front margins 
to the segments ; antenne and legs black ; palpi rufous ; posterior cross-vein beyond the middle between 
the small cross-vein and the curvation of the fourth vein. 
Length 3-3°5 millim. . . 
Head greyish-white ; front broader than the eyes; frontal band blackish, narrower than the lateral portions; 
frontal bristles inserted on black points, on each side in # single row, descending as far as the end of the 
second antennal joint ; vibrissae inserted a little above the oral margin, Antenne shorter than the face ; 
second joint bristly; third joint four or five times as long as the second ; arista thickened to the 
proximal half. Proboscis black; palpi pale rufous, slightly thickened towards the tip. Thorax and 
scutellum cinereous; thoracic dorsum with four black stripes, which are interrupted at the transverse 
suture, the intermediate ones linear. Abdomen ovate, shining black; the second and following segments 
with rather narrow whitish front borders and with marginal macrochete. Middle tibie with some long 
bristles ; hind tibiee outwardly with several bristles of unequal length. Tegule whitish. Wings grevish- 
hyaline; small cross-vein distinctly before the middle of the discal cell; third vein nearly straight ; 
