244 



UNITED STATES NATIONAL MUSEUM BULLETIN 224 



PAUT 1 



fine hairs almost restricted to the lower surface; middle 

 lower surface with a pair of long oblique bristles, base 

 with only a few hairs. The palpus is clearly of two 

 segments, the first short and excavated, the second 

 longer, narrowed at base and apex, and with apical 

 pore and quite slender bristles. Antenna set just above 

 the upper third of head and elongate; first segment 

 nearly twice as long as wide with rather stout and 

 long basilateral bristles and shorter ventral and dorsal 

 bristles; second segment a little less robust, a little more 

 than twice as long as wide with several stout, ventral 

 bristles. Third segment as wide as the apex of the 

 second and distally becoming as narrow as the base 

 of the second segment; this segment is more than 1% 

 times the combined length of the first two segments; 

 its apex is blunt with smaller circular opening and 

 completely recessed and concealed spine ; no dorsal setae 

 on the third segment. 



Head, anterior aspect: The face below antenna 

 about one-fourth the head width and at most slightly 

 divergent below. The whole face surface is micro- 

 pubescent and without pile; bristles are restricted to 

 a conspicuous, close-set, double or partly trebled row 

 across the epistoma ; these bristles are long, stout, pale 

 and but little curved. Front broad, slightly wider 

 than upper face, sunken in the middle, pollinose and 

 with a patch of bristles in the middle of each half 

 below the ocellarium, none along eye margins or none 

 near antenna; vertex slightly narrowed, deeply ex- 

 cavated with slanting sides and rather large, mound- 

 like ocellarium bearing 3 pairs of stout, long, black 

 bristles. 



Thorax : The mesonotum gently convex and not very 

 high, strongly abrupt in front and with abundant, 

 short, appressed, acrostical setae and a bare stripe on 

 either side. There are 2 or 3 rows of dorsocentral 

 elements and the area next to the humerus and lateral 

 margin also have fine setae. Humerus with 5 or 6 

 bristles. Notopleuron with 2 long, stout bristles and 

 the lateral margin in front with a double row of some 

 6, the inner ones shorter. Supraalar region with 4 

 or 5, postalar with 3 long bristles and the scutellar 

 margin with 1 pair of bristles which are long and 

 stout. Metanotal slopes strongly bullose, micropubes- 

 cent only; mesopleuron apparently without bristles 

 and only 2 or 3 fine hairs above and a patch of still 

 shorter, finer pile posterodorsally. Pteropleuron and 

 hypopleuron pubescent only. The pronotum and lateral 

 propleuron bear some weak, long, bristly hairs; meta- 

 pleuron with a narrow, vertical band of slightly curved, 

 weak bristles. Only the lateral metasternum has pile; 

 postmetacoxal area membranous ; anterior basalare with 

 bristly setae ; presternum dissociated. 



Legs: The hind femur rather slender, densely ap- 

 pressed, short setate with few bristles. The bristles 

 consist of 3 short but stout lateral, confined to the basal 

 half; no dorsal or apical or ventral bristles. Tibia 



with more conspicuous bristles consisting of 4 oblique 

 ventral, 2 oblique dorsal near the distal third, and 4 

 oblique lateral bristles. The apical bristles are quite 

 stout and consist of 9 elements, 2 of them medial and 

 2 dorsal. Middle femur with a strong, rather long, 

 posterior subapical bristle, the middle tibia has 3 quite 

 long, stout, black, ventral bristles near the middle and 

 at the outer fifth; also 3 quite short dorsal, 5 short 

 anteroventral, 6 short posteroventral bristles. Apex 

 provided with 8 stout bristles. Anterior femur is like 

 the other femora, slender with 1 short but stout postero- 

 dorsal subapical bristle; its tibia has short bristles 

 above, 4 posterodorsal, 4 more basal anterodorsal, 1 

 stout, ventral at the outer fifth, and 5 or 6 short postero- 

 ventral bristles. The apex of the anterior tibia bears 

 5 bristles and a very stout, curved spine. Basitarsus 

 with a protuberance. Claws long, sharp, strongly 

 arched ; the pulvilli four-fifths as long as claw and thin ; 

 the empodium half as long as claw, curved and flattened. 



Wings : The wings are long and rather slender. The 

 marginal cell is open by a little less than maximal 

 width. The second submarginal cell arises abruptly 

 and wholly above the third vein opposite end of discal 

 cell ; it is long and narrow but strongly flared distally. 

 The anterior branch of the third vein ends a little above 

 wing apex, the posterior branch far behind. First 

 posterior cell a little narrowed on the margin owing 

 to the greater width of the second posterior cell. Sec- 

 ond posterior cell abruptly and strongly expanded 

 anteriorly at its base. The third posterior cell is open 

 along the wing margin to a remarkable extent. Fourth 

 posterior cell open but narrowed and the whole cell 

 remarkably lengthened. Anal cell closed in the margin. 

 Alula large, ambient vein complete. Second basal cell 

 ends in two veins. 



Abdomen : The abdomen is strongly tapered ; it pre- 

 sents a bare appearance but has some microscopic, short 

 setae. Sides with fine, short pile, a little longer on the 

 sides of the first tergite, which bear posterolaterally 5 

 short but extremely sharp, spinous bristles. First ter- 

 gite a third as long as the next. Males with seven 

 well developed tergites present; the seventh is long; 

 the eighth is present and quite short or even confined 

 to a lateral right side lobe. Females with eight well 

 developed tergites. Male terminalia rotate and of mod- 

 erate size and length. The epandrium is short but 

 is fully cleft medially, the two halves rounded, obtuse 

 and diverging posteriorly. Proctiger extended a little 

 beyond the epandrium and divided by a medial crease. 

 Gonopod large and massive but short with one or two 

 sharp-edged, blunt, short, curved processes. Hypan- 

 drium well developed and large and obtuse. Female 

 acanthophorites with 5 pairs of long, stout, blunt 

 spines : tenth tergite with many blunt spikelike bristles ; 

 ventral plate cleft and sunken on the distal part. 



Distribution: Australian: Dakinomyia froggattii- 

 Dakin and Fordham (1922). 



