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UNITKD STATES NATIONAL MUSEUM BULLETIN 2 3 



black ])iibcsceiit; antoiiiinl <rr<)<)VOs not distinct; vihris- 

 Srtl inaririii ni)l (•(ins])icuoiis, with sliort yellowisli hristlj' 

 hairs. Back ol' head (|)1. 27, fiji. 4) strongh' swollen, 

 yellow, iippcf |)(irtioii more or less flat and with black 

 large median |)atcli, latersd swellings consi)icuous, 

 mici-<)scoi)ically black pubescent over entire surface 

 and with long yellowisli ))ristly hairs on lower margin; 

 cheeks fully one si.xtli as high as eye, yellow, obscured 

 by greyish tomentuni, with rather distinct genal groove, 

 lower margin with short yellowisli bristly liairs. Eyes 

 com[)aratively small, in front view rather oblong with 

 upper angle somew liat pointed, in profile oblong, nearly 

 1.7 times as long as wide, upper angle distinctly nar- 

 rower than lower. All bristles mostly black: ocellars 

 diNcrgent, as long as inner verticals but weaker; 

 fronto-orbitals 2: 2, the u])])er superior bristle yellowish 

 white, strong, but shorter than lower superior and 

 directed posteriorly, the inferior pairs directed inward 

 l)ut not crossed, as long as lower superior; jjostverticals 

 yellowish white, |)arallel, as long as upper superior 

 fronto-orbitals; inner verticals longest of all head 

 bristles, directed inward, outer verticals yellowish 

 wliite, slightly longer than postverticals; occipitals 

 not developed; two short, yellowish-white occipital 

 bristles; genal bristle yellowish white. Antennae (pi. 27, 

 fig. <S) sliort, not attaining oral margin, orange yellow; 

 second segment nearly half as long as third, with 

 distinct i)lack median bristle; third segment twice as 

 long as wide, apex very narrowly rounded, dorsal 

 margin slightly concave, ventral margin strongly 

 (■(Mive.x, microscopically blackish pubescent; arista 

 black witli basal portion j^ellowish, microscopically 

 pubescent. Palpi (pi. 27, fig. 9) distinctly longer than 

 antenna, slender, reddish yellow, ventral margin and 

 the ai)e.K with short yellowish bristles. Proboscis 

 moderately long, geniculate, with, long labellum. 



'I'hora.x nearly 1.25 times as long as wide, 1.17 times 

 as long as high, dull black, more or less obscured by 

 greyisii tomentum, covered with a yellowish-white 

 bhuit pubescence. Mesonotum (pi. 27, fig. 5) as long as 

 wide, anterior border rounded as usual; humeral calli 

 reddish yellow, with short yellowish-white bristly hairs; 

 notopleural calli moderately swollen, near middle more 

 or le.ss reddish jellow, bare; scutellum twci-thirds as 

 long as wide, extreme apex reddish brown, without 

 distinct lateral carinae, witli very few fine hairs. Pleura 

 (])1. 27, fig. 6) less tomenlose than notum, very sparsely 

 |)ubescent; prothorax with one row of about five short 

 yellowisli-wiiite bristles; meso])leuron reddish yellow on 

 ui)per border, in addition several yellowisii-white short 

 bristly hall's, posterior margin with distinct yellowish- 

 white setae, of which the ujipermost below the meso- 

 pleural bristle is conspicuously long and bristly; 



[)tero[)leuron witli two or tiiree yellowish-white short 

 bristly hairs just below yellowish-white pteroj)leural 

 bristle; sternopleuron comparatively large, ventral 

 margin witli long yellowisli-white somewhat bristly 

 hairs; posterior stigma distinctly white tomentose; 

 mesophragma and postnotum entu-ely black, obscured 

 by greyisii tomentum. All bristles mostly black: liu- 

 merals as long as anterior notopleural or presiitural, 

 but somewhat finer; posterior notopleurals very short, 

 nearly one fourth as long as anterior; dorsocentrals 

 slightly divergent, nearer to suture than to level of 

 anterior supra-alars, longer than jiresuturals; pre- 

 scutellars parallel, nearly as long as dorsocentrals, 

 distinctly anterior to a line connecting inner ])osterior 

 supra-alars, which are conspicuously longer than for- 

 mer; outer ])osterior supra-alars as long as anteriors; 

 scutellars two paii's, the basal longest of all thoracic 

 bristles, slightly divergent, apical paii" very short, 

 crossed; mesopleural bristle shorter than anterior 

 notopleurals, distinctly du-ected posteriorly; sterno- 

 pleural directed upward, pteropleural dii'ected 

 posteriorly. 



Abdomen (|)1. 27, fig. 1} (without ovipi«itor) as long 

 as thorax, pubescence longer than mesonotum; sixtli 

 tergum slightly longer than fifth, with two j)airs of 

 long black mai'ginal bristles; basal segment of o\'ipositor 

 nearly as long as the three preceding abdominal terga 

 together, with distinct lateral carinae. shining black, 

 rather sparsely covered with blackish microscopical 

 pubescence. 



Wing (pi. 27, fig. 1) longer than body (without 

 ovipositor), rather narrow, apex narrowly rounded, one 

 costal spuie; subcostal vein distinctly undulate, the 

 apical ])orti()n obsolete; R2+3 very slightly undulate; 

 II4+5 quite straight, bare, parallel with m; r-m straiglit, 

 slightly oblique, the posterior end close to whig tip, 

 nearer to middle of IM, than to m-cu; m-cu straight, 

 the anterior end close to wing tip; pterostigma nearly 

 two-thh-ds as long as second costal cell, with apex 

 sharply pointed; anal cell distinctly shorter than basal 

 cell, inferior angle slightly prolonged. Brown, leaving 

 basal fiiurtli whitish subhyaline, witli many large 

 whitish subliyaline spots as follows: second costal cell 

 whitish subhyaline, with a small brown spot at middle 

 of costa; pterostigma darker, with a yellowish-white 

 indentation at middle; Ri with four spots, the three 

 distal situated along costa and extending to R2+3. 

 apical beyond middle of apex and smallest, basal just 

 beyond ])terostigma, proximal spot situated below near 

 apical lialf of second costal cell; R3 with six spots, 

 distal most situated just after ti[) of Rj and extends 

 to K4 j-.-,, median three placed below tlie three distal spots 

 of Ki, and more or le.ss united to each otiier and to 



