46 



I'MTED STATK.S NATIONAL MUSKUM BULLETIN 263 



scopic pubescence, in proiilc, jjostei'ior inai'sin slightly 

 curved outward with u Ijroadly rounded lower aiiii'le 

 and with a rather narrow uj)per anijle. Antenna (pi. 17, 

 fig. 4) a little shorter tiiau face, lonuer than twice 

 widlii, dull yellow; second seojnicnt whitish tonientose, 

 with distinct median bristle; third segment a lit lie 

 longer than twice median width, dorsal margin ratliei- 

 straight with distinct short pubescence at about apical 

 two-thirds, A'cntral margin curved toward rather 

 narrow rouiulish apex atul witli similar l)ut sparser 

 pubescence on apical half; arista nearly as long as 

 antenna, with distiiu-t basal segment, i)lackish, basal 

 portion yellowish, rather long pubescent on apical half. 

 Palpi (pi. 17, fig. 5) very short, hai'dly twice as long as 

 wide, dirty yellowisii, with blackish long bristly hairs 

 on inferior half. 



Thora.x c()m))aratively large, distinctly longer than 

 abdomen, longer than wide or high. Mesonotum (])1. 17, 

 fig. 6) as wide as long, dull blackish, greyish or brownish- 

 grej' tonientose, blackish i)ubescent, without stri])es; 

 humeral calli comparatively small, somewhat yellowish 

 brown, not tonientose but with long black sparse erect 

 |)ubescence; notopleural calli comparatively large, 

 niore or less reddish brown; scutellum 2/3 as long as 

 basal width, dark brown, lateral and posterior rounded 

 margins yellowish brown, disk slightly convex, cohered 

 with a yellowish-brow II lomentum, slightly shining. 

 I'leuia (|)1. 17, fig. 7) shining castaneous black, the 

 ])()rtion below wing-base reddish brown; sterno])leuron 

 with long black bristly hairs at inferoj)osterior corner; 

 mesoi)leuron with a very few scattered black hairs 

 of whicli two along sui)erior margin are distnict; jjost- 

 notum shining black; mesophragma black, more or 

 less dusted. All bristles black and long: scapvdars two 

 ])airs; noto])leurals two, posterior one conspicuously 

 shorter than anterior; i)resutural as long as anterior 

 notopleural or hmneral; supra-alars 1:2, very long 

 (especially inner |)ost-alars), outer ])ost-alars conspicu- 

 ously bent at middle; dorsocentrals distinctly l)ehiiid a 

 line connecting anterior supra-alars; prescutellar at 

 level of inner jiosterior supra-alars; seutellars two 

 pairs, divergent, the apical pair shorter than basal; 

 mesopleurals two, ])teroi)leural and sternoideural one. 



Abdomen (i)l. 17, fig. 8) black, covcreil with greyish 

 dust, strongly shining, black jiubescenl ; sixth tergiiin 

 half as long as preceding, both witli long black bristly 

 hairs along ])osterior margins; ovipositor shining black, 

 short, basal segment nearlj' twice as long as si.xth 

 terguni, with two black bristly hairs on middle of 

 apex. Venter somewhat paler than dorsum. 



Wmgs (pi. 17, fig. 9) clear, nearly as long as the body, 

 longer than twice the width, with brownish-black pat- 



tern as follows: basal patch extending a little beyond 

 r-in, bill alulae, anal lobe, and first costal cell entirely 

 hyaline, two costal indentations, of which apical is 

 (juite triangular and situated just beyond pterostignui, 

 extending to base of r-m, the second one in second 

 costal cell hardly extendmg to M, but suddenly nar- 

 rowed and infuscated in R, second section of M with a 

 very small hyaline round spot in R. Hind border of 

 basal patch attaining anal vein, its basal half brownish 

 and apical half hyaline but with a broad brown pro- 

 longation not attainhig center of anal vehi. Brownish 

 black semicii'cular apical streak beginning at about 

 middle of apex of R,, on costal margin and R2+3, and 

 attains end of cu along ni-cu. Costa not extending 

 beyond end of m, costal spine very short, basal bristle 

 rather long, situated just before middle of first costal 

 cell; apical section of R4+5 slightly curved, bristled from 

 base to just beyond r-m; m more or less parallel with 

 R4+.5; ^5 somewhat broadened toward apex; r-m nearly 

 jierpendicular, very slightly concave, situated conspic- 

 uously beyond middle of IM,; m-cu distinctly convex, 

 strongly oblique, lower angle of IM, therefore pointed; 

 pterostigma a])proximately half as long as second costal 

 cell; anal cell distinctly shorter than M, the lower angle 

 dr;iwn out into a long point. Halteres rather long, light 

 yellowish. 



Legs yellow, blackish piil>escent, with the feinnra of 

 two posterior pairs blackish. Forelegs (pi. 17, fig. 10) 

 conspicuously shorter than two posterior pairs; femur 

 with two rows of black sparse bristles on externodorsal 

 surface and with approximately seven Idack long 

 bristles t)n externoventral margin; tibia distinctly 

 shorter than femur or tarsus; first tarsal segment very 

 slightly longer than the four following segments to- 

 gether, internoventral surface with light yellowish 

 dense blunt bristly hairs. Midleg (pi. 17, fig. 11) as long 

 as hindleg; femur nearly as long as tibia, shorter than 

 hindfemur, externoventral margin with long black 

 hairs; tibia distinctly longer than hind tibia, with one 

 blackish apical spur, in addition very short bristles at 

 apical margin. Hindleg (pi. 17, fig. 12): femur with 

 four black long bristly hairs near dorsal apex, black 

 long hairs present at about middle thu'd of externo- 

 ventral margin, apical externoventral margin with one 

 row of four black short bristly hairs; tibia conspic- 

 uously shorter llnvn femur, slightly shorter than mid- 

 tibia, more or less bent near l)ase; tarsi as in midleg, 

 distmctly shorter than tibia, first segment slightly 

 shorter than the four following segments together, 

 setae on internoventral surface rather sparse. 



T^ength: Body (without ovipositor) 4.2 mm, wing 

 4 mm. 



HoLOTVi'E. — Female, Okhiawa Is., AprU (NIASj. 



