54 FAUNA HAUAIIENSIS 



one upright and the other pointing outwards, two ocellar bristles' pointing forwards and 

 two upright ones behind the vertical triangle ; face perpendicular, about as long as the 

 front and distinctly convex longitudinally, at the lower angle on each side is a conspicu- 

 ous row of strong black bristles which are curved inwards in front of the face ; chin with 

 a few bristles ; proboscis thick, palpi clavate ; eyes large, oval ; antennae with the third 

 joint oval, rounded at the end, longer than the first two joints taken together, arista 

 long, with long hairs along the whole length of the upper surface and a few on the 

 apical half beneath. Thorax with two pairs of conspicuous and one or two pairs of 

 smaller dorso-central bristles behind the suture, two humeral, one presutural, two noto- 

 pleural and four supra-alar bristles ; scutellum with two lateral and two apical decussating 

 bristles. Abdomen rather small, conical, in the male with seven distinct segments, the 

 sixth furnished with a row of long fine hairs near the hind margin and with a curious 

 spathulate appendage below, attached by a slender pedicel to the hind margin, seventh 

 segment small, laterally compressed and furnished with long, rather tortuous hairs. 

 Legs rather stout, the tibiae a little thicker at their extremities, the hind pair slightly 

 bent. Wings large, much exceeding the abdomen ; last segment of fourth longi- 

 tudinal vein nearly three times as long as the penultimate, posterior transverse vein 

 oblique, and hence making an acute angle with the fifth longitudinal, anal cell small but 

 distinct. 



Type of genus : Hypcnomyia varipennis, sp. nov. 



( 1 ) Hypcnomyia varipennis, sp. nov. 



$. Long. Corp. 6 — 7 mm. ; al. 7 mm. Front yellow, upper half of the orbits 

 darker, the vertical triangle dark brown, face light yellowish-grey, somewhat shining, 

 antennae reddish-yellow, palpi and proboscis yellow. Thorax obscure yellowish in 

 front, behind with four broad, ill-defined brown stripes, pleurae for the greater part 

 brown, scutellum brown above with the sides yellow, metanotum and halteres yellow. 

 Abdomen dark brown. Legs yellow, with the fore tibiae except the bases, the tips of the 

 intermediate and hind tibiae and the greater part of the intermediate metatarsi blackish. 

 Wings tinged with fuscous, leaving the second costal cell, the bases of the marginal and 

 submarginal cells, a quadrate spot on either side of the anterior transverse vein, a 

 subtriangular spot in the discal cell, an oval spot below the base of the fifth vein, one 

 below the tip of the second, one between the tips of the third and fourth veins, and 

 more or less of the posterior margin of the wing hyaline. 



Hab. Molokai Mts., two males, 5000 ft., September 1893. 



Plate III. figs. 5, side view of head, and 6, wing. 



