56 R. W. CROSSKEY 
frontal rows; no proclinate orbital setae; interfrontal area sparsely haired; parafrontals 
haired; parafacials haired on most of their height (only bare at lower ends) with similar dark 
hairing to that on the parafrontals; vibrissae absent; facialia with a row of long rather weak 
setae along the front inner edge (when head seen in profile the row extending from the level 
of the apex of the antenna to the anteroventral corner of the head) and elsewhere covered 
with long strong hairing; setulae of postocular row very weak; occiput flat above; postbuccal 
regions with fine dark hairing, postgenal and mid occipital regions with yellowish hair. 
Antennae inserted about level with eye middle or slightly above, head about as long at 
antennal axis as at the epistome when seen in profile; antennae exceptionally small, third 
segment almost orbicular and only a little longer than second segment; antennae falling 
short of epistome by a distance very much greater than their own length; arista pubescent, 
thickened only at its extreme base; proboscis very short, palpi large and flattened and 
unusually long haired. Thorax. Notopleuron rather strongly triangular, with usual two 
notopleural setae. Prosternum, prosternal membrane and propleuron bare. Propleural 
seta minute, one strong prostigmatic seta. Anterior spiracle without hair fringe around the 
opening, sclerotized area of the spiracle large, slightly convex and sparsely long haired. 
Humeral callus with two strong setae. Pteropleural seta absent, sternopleural setae I + I. 
Three strong hypopleural setae; pleurotergite bare. [Mediotergite dirty or damaged, 
condition of infrasquamal hairs unknown.] SBarette sparsely haired anteriorly. [Chaetotaxy 
of mesonotum uncertain owing to extensive damage but apparently as follows: 1 + 3 za setae 
(of which prst¢ and first post ia hair-like); probably 2 + 3 dc; at least 1 + 2 acr setae but 
probably more; small pre-alar seta.] Scutellum with only two pairs of marginal setae (basals 
and subapicals), no lateral or apical setae or definite discal setae; subapical setae slightly 
divergent and rather weak, distance between their bases subequal to that between a subapical 
seta and its corresponding basal seta; hairing of scutellar disc rather weak but long and 
semi-erect. Postscutellum very strongly developed. Legs. Rather short and with very 
reduced chaetotaxy. Fore coxa bare on inner anterior surface; fore tibia with two minute 
pu setae. Mid tibia without a submedian v seta, with one very small ad seta on apical half 
and with two or three minute p setae. Hind coxae rather close to abdominal base, bare 
on posterodorsal edge; hind tibia with several very small ad and pd setae or setulae, with 
one small av seta, without definite pu apical seta, and without the normal d preapical seta 
(the dorsal preapical setae represented only by the ad preapical). Wings. Narrow, very 
faintly smoky brownish, especially anteriorly. Vein R,,; with minute setulae extending 
from node about half-way to v-m, wing veins otherwise bare. Second costal sector bare 
below. Cell R,; well open at wing margin. Bend of vein M evenly and gently rounded, no 
trace of appendix; distance on M from bend to m-—cu subequal to that between 7m and m-—cu; 
m-—cu straight, apical section of Cu, very short and only about half as long as m—cu. Second 
costal sector short (length not exceeding that of m-—cu). Sixth vein stopping well short of 
wing margin. Calyptrae normal, lower one moderately broad and bare on dorsal surface. 
Abdomen. Short subovate with Tr + 2 not excavate to its hind margin; each visible tergite 
subequal in length. Sternites exposed, isolated in wide membranous area of abdominal mid 
venter. Abdomen completely devoid of bristles, vestiture composed solely of short fine 
recumbent hairing (the hairing only slightly longer at tergite margins than elsewhere and 
nowhere erect). All sutures between tergites normal, no trace of fusion. ¢ hypopygium 
small, no noteworthy external characters [not examined at this time as holotype unique: 
later examination of male genitalia may well shed light on the affinities]. Colovation. Almost 
entirely blackish brown; antennae, lower end of interfrontal area and area of head between 
genal dilation and facialia paler reddish brown; abdomen covered with pale yellowish pollinosity 
that is thickest on basal parts of the tergites, the tergites therefore appearing darkest towards 
hind margins and also medially but appearance slightly shifting with light direction. Body 
hair black or brownish black except for some yellowish hair posteriorly on the head. Measure- 
ments. Body length about 6-0 mm, wing length 5-3 mm. 
The holotype bears three handwritten ink labels that read ‘56’, ‘Thorey 1864 
