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.] Barette sparsely haired anteriorly. [Chaetotaxy 

 of mesonotum uncertain owing to extensive damage but apparently as follows: i -f- 3 ia 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 

 pv 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 pv 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 i+5 with minute setulae extending 

 from node about half-way to r-m, wing veins otherwise bare. Second costal sector bare 

 below. Cell i? 5 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 r-m and m—cu; 

 m—cu straight, apical section of Cu x 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 Ti -f 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, g 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]. Coloration. 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-o mm, wing length 5-3 mm. 



The holotype bears three handwritten ink labels that read '56', Thorey 1864 



