70 



UNITED STATES NATIONAL MUSEUM BULLETIN 2 63 



preceding abdominal (erga togetlior, witli distinct 

 lateral carinae. 



Wing (|)1. 20, fig. 1) distinctly longer tlian body 

 (witiiout ovi|)ositor), 2.5 times as long as wide, apex 

 narrowly rounded, two comparatively short costal 

 spines; Sc distinctly undulate on l)asul lialf: R, mod- 

 erately curved so that tip of ptcroslignia is rather 

 sharply ])ointed; R2+3 nearly straight, but tip dis- 

 tinctly divergent with R4+5, latter witliout bristles, 

 straiglit, parallel with m; r-m straight, ])erpendicular, 

 nearer to nii(hlle of iMo than to its apex; m-cu slightly 

 coinex, less than twice as long as r-m, almost parallel 

 with latter; ptcrostigma nearly 0.6S times as long as 

 second costal cell; anal cell a little shorter than basal 

 cell, apical mai'gin more or less angularly concave, 

 inferior angle i)ointed, more or less prolonged. Wings 

 blackish brown, basal j)ortion white sul)hyaline, with 

 many \\liite subhyaline spots as follows: second costal 

 cell with two large quadrate spots, of which the basal 

 irregularly extends to m and is distinctly larger than 

 apical; pterostigma with two spots, one just beyoiul 

 costal incision very small and somewluit yellowish, 

 othei' in middle, quadrate, extending from costa to 

 R,; R, witli four, one just below apex of second costal 

 cell smaller and rounded, remaining three large spots 

 from beyond tip of pterostigma to just proximad of 

 apex of cell, equidistant along costa, attaining R2+3, 

 the middle s|)ot largest; R3 witli seven spots, two at 

 apex, tiie following three just below costal indentations 

 in Ri, tlie two remaining aliove first section of R4+.5; 

 R5 with six s])ots, apical j)laced just below middle of 

 apex, the following pair ver^' near a|>ical, the next in 

 middle of cell, between it and largest basal spot one 

 very smsdl spot along Hi+r,; R with two round spots, 

 before and after basal spot hi R3, respectively; 2M2 

 witli four round s])ots, al)out the same size, the three 

 along the wing margui almost equidistant, the other 

 near anterior basal corner; IM2 with fi\e s])ots, two 

 in basal half and tliree in ai)ical half, the semicircular 

 subbasal one largest and occupying the entire widtli, 

 the apical at inferior corner smallest aiul rounded, the 

 next beyond r-m along m, and tiie tiiird just beyond 

 subbasal sjx)! along ("u; C'u with seven, of wliich three 

 are along wing margin, tiie apical two quite rounded 

 and smaller, the third rather irregular in sjiape, the 

 four remaining along Cu, the basal at superior basal 

 corner, the subbasal largest and extending from Cu 

 to anal vein, the next touching l)asal s[)ol of wing 

 margin; anal lol)e with three along ])osterior margin, 

 almost filling posterior half and leaving three blackish 

 irregular sjjots along anal vein. Halteres reddish 

 yellow; squamulae brownish. 



Legs light brownish yellow, femora almost blackish 

 bro\\7i, blackish j)ubescent. Foreleg (pi. 26, fig. 10) 

 shortest, more or less paler than the others; femur as 

 long as tibia, dorsal surface with black very sparse 

 short bristly hairs ui two rows, externoventral margm 

 with five long black bristly haii's; tibia shorter than 

 tarsus; first tarsal segment as long as the three followmg 

 segments together, with rather short somewiiat yel- 

 lowish brushlike bristles on internoventral surface, 

 second segment nearly as long as the two following 

 segments together. Midleg (pi. 26, fig. 11) little longer 

 than hindleg; femur shorter than tibia, without con- 

 spicuous bristly hairs; tibia distinctly longer than tarsus, 

 with one black long ai)ical spur; first tarsal segment 

 about one-third times as long as tibia, nearly as long 

 as the three following segments together, brushlike 

 bristles on ventral surface rather sparse and siiort, 

 second segment a little shorter than the two h>llo\\ing 

 segments togetlier. Hindleg (pi. 26, fig. 12): femur as 

 long as til)ia, dorsal apex w ith one pair of bhick bristly 

 hairs, apical exteriU)\entral margin with more oi' less 

 long black hairs; til)ia nearly as long as tarsus; first 

 tarsal segment half as long as tibia, nearly as long as 

 four following segments together, second segment as 

 long as the two following segments together, brushlike 

 bristles on ventral surface as in midtarsus, 



HoLOTVPE. — P'emale, Okinawa Is., Apr. 7, piesented 

 by Mr. A. Matsumoto (XIAS). 



Piiroxynn irioniotensis, new species 



Pl.^te 27 



Allied to I'aroxyna arisanica Shiraki (193.3, p. 409, 

 fig. SO, pi. 12, fig. 1), but at once distinguished by the 

 large subhyaline spots of the wings and tlie nonstriped 

 mesonotum. 



F.EM.\LE. — Head as wide as thorax, nearly 1.4 times 

 as long as w ide, slightly longer than high. Frons (pi. 27, 

 fig. 2) about twice as wide as ev'e, slightly narrowed 

 forward with straight lateral margins, orange yellow, 

 posterior half somewhat darkened, with a very luirrow 

 wliitish-grey median longitudinal line; orbits very 

 narrow, more or less greyish dusted wilii whitish sparse 

 pubescence; lunule more or less greyish tomentose, 

 rather convex; vertical calli verj- narrow and short, 

 nearly one third as long as frons, somewhat elevated; 

 ocellar triangle blackish, with comparatively small 

 ocelli are equidistant and rather far a])art, vertical 

 carina not shar]). Face (pi. 27, fig. 3) <'om])aratively 

 small, nearly as long as wide but disthictly broadened 

 below, slightly hollowed, light reddish yellow, more or 

 less greyish tomentose; orbits com])aratively broad, 

 distinctly widened below, well elevated, microsco])ically 



