94 



UNITED STATES NATIONAL MUSEUM BULLETIN 203 



of eves to be inoderalelv rouiull>' [jrodiued into lace, 

 strongly liollowed al middle so lliat oral maiiiiii and 

 portion just below antennae stronjily produced for- 

 ward; iintennal grot)ves very narrow, allaining oral 

 niartjin; orbits very narrow, distinctly wliitisli tonien- 

 tose; ei)istonia prominent witli a |)air of faint dark 

 spots. Back of iiead (pi. 85, fiii'. 2) rallier Hat, nioilerately 

 swollen below, liglit yellow api<'al lialf l)lack, leaving 

 entire surface of eye-margins and extreme \ertex con- 

 s])icuously coxered witli wliitisb tomentum, many long 

 wlule bristiv liairs on lower margin, black setae and 

 one conspicuous white bristle present al)o\e genul 

 bristle; cheeks narrow, yellowish wlule, genal groove 

 faint; vibrissal margins with a few wliite l)ristly hairs 

 on lower portion, a few minute setae at its angle. 

 Anteimae (pi. :^5, fig. 5) inserted just above middle of 

 eye, light yellow, long, distinctly exceeding face; 

 second segment comparatively short, median bristle 

 conspicuous and black, with some short black bristly 

 setae along apical margin and two or three long white 

 bristles at inferior apex; third segment four times as 

 long as preceding, gradually narroweil toward pointed 

 apex, wliich possesses a minute white style, dorsal 

 bordei- brownish black, microscoi)ically black pubes- 

 cent on dorsal ludf and white on renuiinder; arista twice 

 as long as tliird segment, white, basal segments light 

 yellow, microscopically pubescent. Palpi (pi. r}5, fig. 6) 

 light yellow, long and narrow, narrowed toward 

 pointed apex, dorsal margin more coinex than ventral 

 margin, the former with about two rows of short 

 black bristles, latter with short black bristles and five 

 or six long bristles, the apical three blackish, remaining 

 ones white. All bristles black and white: ocellars white, 

 very strong, rather swordlike, far apart, di\ergent, 

 far ahead a pair of "frontal bristles" alxMit middle of 

 frons; fronto-orbitals 2:3, upper superiors white and 

 swordlike, conspicuously shorter tiuin lowers, which 

 are dark colored, two upper inferiors black and longer 

 than lower su])eriors, lowest inferior ])air white, shoit 

 and swordlike; inner vei'ticals sligiitly darkened, con- 

 spicuously strong, almost sLx times as long as outers, 

 which are white and swordlike, two short whitish 

 bristles between inner and outer verticals, one close to 

 imier \erticals distinctly longer than tlie otlier, and one 

 blackisii and finer; postverticals white, as long as and 

 very slightly more slender than ocellars, almost con- 

 vergent, directed distinctly forward, at level of post- 

 verticals behind iimer verticals one white swordlike 

 bristle (imier occijiital); bristles of occipital row of 

 three wlute blunt and some slu)rter black ones, the 

 uppermost (outer occipital) wliite smd sitmited near 

 occipital bristle; genal bristle black, rather weak, a 

 somewhat stronger wliite biislle just al)o\e it. Inner 



margins of ey(>s wlicn viewed from front ronndiy l)ut 

 rather n,'irn>wly |)id(luccd into face Ix'iow aiitcmial 

 bases; in profile neaily per|)eiidicular. posterior margin 

 distinctly coinex, upper angle less rounded tiian lower 

 angle. 



Thorax longer than wide, as wide as high. Mesono- 

 tum (|)]. 3.5, fig. 7) nearly as wide as long, black humeral 

 and iiotopleiiral calli yellowish, obscured by greyish 

 tomentuni and covered with rather sparse wiiitish and 

 black pubescence, insertions of bristles distinctly black, 

 two pairs of distinct white erect setae at middle, one 

 pair just liehind ])osterior mai'gin and otlier just behind 

 level of prescutcllais longer and stronger than the 

 pubescence scattered over notum. Scutellum nearly 

 twice as w itle as long, colored and tomentose as on 

 mesonotum, witli large, ill-ilefined reddisii-yellow a])ical 

 and small basal spots, bare, one short whitish bristly 

 hair near basal corner. Pleura (pi. 35, fig. 8) black, 

 prothorax yellowish, sometimes the sutural borders 

 paler, slightly greyish tonientose; prothorax witii short 

 wiiitish bristles; nieso|)lcuron with sparse while and 

 black pubescence; pteropleiiroii with one or two rather 

 distinct bristly white hairs; sternopleuroii black, 

 microscopically puliescent, \entral border with dense 

 long black hairs, s<ime of which on ventral angle are 

 yellowisli, in addition one long yellowish bristle. 

 Mesophragma and j)ostnotum entirely black, obscured 

 by greyisii tomentum. All bristles lilack except scapu- 

 lars, ajiical scutellars, and sternoi)lenrals, which are 

 distinctly white; sca])ulars one i>air, very short, and 

 obtusely ])ointed; humerals as long as presuturals, 

 slightly shorter than anterior notopleural, the latter 

 nearly twice as long as jiosterior noto])leural, which is 

 distinctly straight; dorsocentrals conspicuously behind 

 level of anterior siipra-alars, longer than ])resuturals, 

 slightly divergent; ])rescutellars distinctly behind line 

 Connecting inner ])osterior sujira-alars, which are longer 

 than former; scutellars two pairs, the basal longest of all 

 tlioracic bristles but shorter than those of n^esonotum, 

 jiarallel, a|)ical ])air very short and crossed; meso])lcurals 

 one or sometimes two, ])lero]ileural and steriiopleural 

 bristles one. 



Abdomen (|)1. 35, fig. 9) nearly as long as thorax, 

 distinctly broader tlian tlie latter, blackisii, obscured 

 by greyish dense tomentum and covered witli rather 

 sparse whitish pubescence, in fresh s])ecimens an ill- 

 defined yellowish-grey tomentose median longitudinal 

 stri[)e almost fhrougiiout entire lengtii; fifth tergum 

 as long as third and fourth terga together, extreme 

 apex shining black, posterior margin witli about three 

 ])airs of whitish long bristles; sterna more or less yel- 

 lowish blown; genitalia shining castarieous brown- 

 apiiendages yellowisli. 



