92 



UNITED STATKS NATIONAL MITSEUM BULLETIN 203 



distinctly elevated, distiucUy pubescent; vertical calli 

 comparatively large, extending to a point just ahead 

 of middle of frons, shining; Innule elevated, somewhat 

 paler tlian frons, distinctly tomentose; ocellar triangle 

 comparatively large, blackisli, ocelli equidistant and 

 rather large, especially tiie median one conspicuous, 

 a rather sliarp transverse carina present. Face (pi. 34, 

 lis. 4) rather narrow, slightly broadened below, slightly 

 wider tlian long, moderately hollowed, oral margin 

 rather strongly produced forward, yellow, obscured by 

 whitish tonientum; orbits very narrow, more of less 

 elevated, distinctly whitish tomentose; antenna! grooves 

 not distinct; epistoma rather broad, distinctly white 

 tomentose. Back of head (pi. 34, fig. 2) slightly hollowed, 

 lower |)(irtion moderately swollen, black, eye-margins 

 and low ei- sweUings light yellow, with bristly yellowish- 

 white liairs on lower portion, a sparse black pubescence 

 toward the eye-margins; cheeks linear, without distinct 

 genal groove, light yellow, lower margin with short 

 bristly l)lack curved hairs e.xtending to vibrissa! margin 

 wliere they become disthictly shorter. Eyes large, inner 

 margin in front view slightly convex, in profile oblong, 

 iMit posterior nmrgin less convex and npper angle 

 nanowly rounded. AU bristles almost brownish yeUow: 

 ocellars divergent, far apart at bases, slightly shorter 

 than lower superior fronto-orbitals; fronto-orbitals 

 2:3, tiie upper superiors distinctly shorter than lower 

 su])eriors, divergent, inferiors more or less crossed, 

 the lowest shorter and the two uppers nearly as long 

 as npper superiors; postverticals strong but short, 

 more or less divergent; inner verticals longest of all 

 head bristles, slightly divergent, outer verticals whitish, 

 nearly one-third as long as former; occipitals only one 

 pair, whitish, nearly as long as postverticals, directed 

 distinctly inward; bristles of occipital row composed 

 of almost fo\u- stout whitish ones intermixed with 

 black firu> setae; genal bristle not more conspicuous 

 than bristly hairs on swelling of back of head. Antennae 

 (pi. 34, fig. 5) inserted at middle of eye, light yellowish, 

 not attahiing oral margin; second segment nearly 

 half as long as the following, median bristle not con- 

 spicuous; third segment nearly twice as long as wide, 

 oblong, dorsal nuirgin with rather long (illation; arista 

 black, basal segments yellowish, microscopically pubes- 

 cent. Palpi (pi. 34, fig. 6) yellowish white, comparatively 

 broad, ventral margin distinctly convex and with 

 black long bristly hairs. 



Thorax nearly 1.4 times as long as wide, slightly 

 longer than high. Mesonotum (pi. 34, fig. 7) nearly 

 as wide as long, blackish, entirely obscured by dense 

 yellowish-grey tomentum, covered witli many fine 

 blackish hairs, with three brown longitudinal stripes, 

 the median narrower than remaining and extending 



to level of roots of dorsocentral bristles, tlie outer 

 extending from imier corners of humeral calli to just 

 ahead of j'oots of dorsocentral bristles tlu'ougli inner 

 ends of suture, roots of all bristles distinctly black; 

 humeral calli comparatively small, yellowish, with 

 one or sometimes two whitish short bristles; noto- 

 plenral calli rather conspicuous, never pale; scutellum 

 1.7 times as wide as long, triangular, more or less 

 l)aler than mesonotum, obscured by a moi'e yellowisli 

 tomentum, with an ill-defined yellowish-grey median 

 longitudinal stripe, disk slightly convex and not pubes- 

 cent, lateral borders rounded and very sparsely pubes- 

 cent. Mesophragma and postnotum blackish, covered 

 with whitish tomentum. Pleura (pi. 34, fig. 8) yellow, 

 ui)per portion of mesopleuron blackish, metaplevu'on 

 distinctly obscured by whitish tomentum, very sparse, 

 distinct, yellowish setae on blackish portion of meso- 

 pleuron; prothorax with three or four stout but short 

 yellowish bristles; ventral border of sternopleuron 

 with long yellowish hairs, one of which is conspicuously 

 long and bristly. All bristles mostly brownish: scap- 

 ulars almost always poorly developed; humerals 

 slightly longer than presuturals or anterior noto- 

 [)leural; posterior notopleural slightly curved, fidly 

 liaK as long as anterior; dorsocentrals distinctly ahead 

 of a line connecthig anterior supra-alars, the latter 

 longer than presutural, as long as former; prescutellars 

 jiarallel, just ahead of level of inner posterior supra- 

 alars, the latter conspicuously longer than the former, 

 as long as outer posterior supra-alars; basal scutellars 

 longest of all thoracic bristles, but only slightly longei- 

 than inner jjosterior supra-alars, apical paii' nearly 

 one-third as long as basal, crossed; mesopleurals two 

 or sometimes three, in the latter case the lowest con- 

 spicuously short; i)teropleural and sternopleurals nearly 

 as long as npper mesopleural, tlie former directed 

 posteriorly and the latter upward. 



Abdomen (pi. 34, fig. 9) nearly as long as head and 

 thorax together, a little narrower than thorax, nearly 

 1.4 times as long as wide, yelk)W, somewhat reddisli 

 apically, moderately shining, sparsely blackish pulies- 

 cent; fourth tergum with four equidistant small riHind 

 blackish spots on median transverse line; fifth tergum 

 nearly 1.5 times as long as preceding, with eight 

 blackish roundish small spots, two near anterior mar- 

 gin, the remaming ones just behind median trans- 

 verse line in one row, the two outer spots situated 

 close together, the two anterior spots sometimes 

 connected with the two median posterior ones forming 

 two longitudinal stripes, posterior margin black, with 

 about three jiairs of distinct black bristly haii's; geni- 

 talia conspicuous, yellow, bases of daspers black. 



