68 



UNITED STATKS NATIONAL MUSEUM BULLKTIN 2f)3 



spots in R3, two s])ots in the pterosliniiia, the colora- 

 tion of frons and scntelluni, and tlislinctly spotted 

 thorax. 



Femai.e. — Head as wide as thorax, l.R times as wide 

 as lonsr, nearly as long as high. Frons (pi. 26, fig. 3) 

 Hat. fully twice as wide as one eye, lateral margins 

 nioie or less conxex. very slightly narrowed apically, 

 liglit brownish grey, more or less whitish tomentose, 

 with a rather l)road wliiter median longitudinal streak 

 slightly broadened j)osteriorly and extending from 

 lunide to \ertex, the latter coloi'ed as in median streak; 

 orbits (lislinclly co\ered witli a while tonienlnin and 

 sparsely furnished with whitish ])ul)escence; lunule 

 concave, wliite tomentose; vertical calli more or less 

 distinct, not extending to middle of frons, slightly 

 elevated, not shining but well dusted witii white 

 tonientuni; ocellar triangle ratiier distinctly blackish, 

 (juadrate. Face (|)1. 26. fig. 4) slightly hollowed, con- 

 s|)icuously l)road. nearly twice as wide as long, with 

 lateral margins straigiit. somewhat yellowisii. obscured 

 by snow-white tomentum; orbits comparatively broad 

 and distinct, nearly same width throughout entire 

 length, dusted more heavily with snow-wliite tomentum; 

 antennal groves faint ; vibrissal mai'gin not conspicuous. 

 with whitish jjubescence. Back of head (|)1. 2(i, fig. 2) 

 strongly swollen but upper portion Hat, yellowish, 

 ob.scured by white tomentum, with a very large blackish 

 ]iatch on upper [xirtion, lower border with long whitish 

 f)iistly hails, remaining portion witli black nncictscopic 

 ])ubescence; cheek nearly one-sixtli as high as eye, 

 yellowish white, lower margin with long whitish 

 t)ri^tly hairs, vibrissal marghi with blackish setae. 

 Eyes microscopically but distinctly pubescent, com- 

 paratively small, in ])rofile oblique, oblong, with anterior 

 and posterior nuirgins similarly curved outward, u|)i)er 

 and lower angles rather narrowly rounded. All bristles 

 mostly black: ocellars at level of median ocellus, 

 comparatively weak but longer than lower superior 

 fronto-orbitals, divergent; fronto-orbitals 2:2, the 

 upper superior pair whitish and distinctly shorter than 

 remaining j)airs, inferior ])aii's shorter than lower 

 superiors, directed inward but not crossed; inner 

 verticals longest of all head bristles, curved inward 

 apically, outers whitish and stronger than upper 

 superior fronto-orbitals; jiostverticals whitish, parallel, 

 a little shorter tlian u])|)er sujierior fronto-orbitals; 

 occipitals one i)air, whitish, \ery slightly shorter than 

 postverticals; three bristles of occi|)ital row wlutish 

 intermixed with very short black bristle hairs. Antemuie 

 (pi. 26, hg. 5) not attaining oral margin, dirty yellowish; 

 second segment nearly two-thirds as long as following, 

 with a ratfier fine median bristle; third segment fully 

 half as wide as long, dorsal apex more or less pointed 



and rather long pubescent; arista entirely black, 

 l)lack-pubescent. Palpi (pi. 26, fig. 6) light yellow, 

 three times as long as wide, nearly straight, with ventral 

 apex narrowly rounded, very sparsely black bristled. 



Thorax fully 1.2 times as wide as, or a little longer 

 than, high. Mesonotum (pi. 26, fig. 8) as long as wide, 

 anterior border evenly rounded, blackish, distinctly 

 obscured Ijy grej'ish tomentum and sparsely covered 

 by whitish pubescence, prozona with three very faint 

 brownish longitudinal streaks, a blackish spot at each 

 root of the ])resuturals, dorsocentrals, ])rescutellars, 

 and imuM' ])osterii)r supra-alars; Inimeral and noto- 

 pleural calli more or less yellowish, latter distinctly 

 elevated; scutellum Tiearly twice as wide as long, 

 disk not flat, lateral carinae basal only, blackish, 

 apex yellowish, entirely obscured liy greyish tomen- 

 tum, with a very few yellowish-white hairs on marginal 

 portions, one ])air blackish-brown round spots just 

 inside roots of l)asal bristles. Pleura (jd. 26, fig. 7) 

 blackish, riuite obscured by a greyish tomentum, 

 with anterior stigma distinctly wliitish tomentose 

 and posterior stigma distinctly light reddish-white 

 tomentose; jirothorax more or less yellowish, with 

 four or five yellowish-white short bristles; mesopleuron 

 with short whitish bristly hairs on up])er and ])osterior 

 borders, at an ill-delined l)rownisli spot about nuddle; 

 sternopleuron with short yellowish-white bristly hairs 

 along ventral nuirgin ; mesophragma and jiostnotum 

 blackish, evenly grey tomentose. All bristles almost 

 black: scapulars whitish, very fine, the median pair 

 close together, the outer composed of about four 

 bristles; hmneral as long as anterior notopleural or 

 presutural; jxisterior notoideural slightly shorter than 

 anterior; dorsocentrals jjarallel, situated just behind 

 suture, far before level of anterior supra-alars, as long 

 as i)rescutellars; prescutellars parallel, distinctly before 

 line connecting inner posterior supra-alars, nearly as 

 long as latter; scutellars two pairs, the basal longest 

 of all thoracic bristles, slightly divergent, ajjical pair 

 very short and crossed; mesopleural a little siiorter 

 and finer than antei'ior notopleural, directed hindward; 

 pteropleural one, whitish, rather strong but consj)icu- 

 ously shorter than mesopleural, directed hindward; 

 sternopleural as long as mesopleural, directed jjostero- 

 dorsally. 



Abdomen (pi. 26, fig. 9) (without ovipositor) 

 shcjrter than thorax, black, entirely obscured by 

 greyish-white tonu'ntum, covered with ratiier sparse 

 yellowish-white j)ubescence, third to sixtli terga each 

 with one im'iv of somewhat quadrate blackisii-brown 

 spots; sLxth tergum as long as preceding with two pairs 

 black erect margimd bristles; basal segment of ovi- 

 l)ositor sliining black. dej)ressed, as long as three 



