5. ODONTOMYIA 141 



Thorax shining brownish black, densely clothed all over with erect brownish 

 orange or almost bi'ownish red pubescence, which but little obscures the 

 ground colour ; this pubescence is rather longer, shaggier, and paler on the 

 pleurae, and is even fuzzy on the metapleurse. Scutellum shining black, Avith 

 all the margin broadly brownish orange ; spines stout, sharply black at 

 the tip. 



Abdomen shining black, with large conspicuous orange spots and tip, broad 

 and flat, even the disc being hardly arched ; basal segment with a small orange 

 spot at each extreme hindmarginal corner ; second segment with a pair of 

 large triangular reddish orange spots, occupying the basal corners and each 

 extending along more than a quarter of the hindmargin and then sloping back 

 across the disc so as to include the point of the shoulder ; third segment with 

 a pair of larger trapezoidal reddish orange spots which occupy the hind 

 third (to half) of the sidemargins but extend inwards as far as the previous 

 spots and have an irregularly perpendicular inner margin which reaches fully 

 three-quarters up the segment and then slope back on their own upper margins 

 to the sides, the irregularity of their inner margin being often caused by the 

 portion against the hindmargin of the segment being produced rather more 

 inward than the middle and upper ]3ortions of the spot ; fourth segment with 

 a pair of similar large orange s])ots having their inner margins more distinctly 

 extended inwards near the hindmargin of the segment ; fifth segment with a 

 broad reddish orange (paler orange about the middle) margin except at the 

 basal corners ; small sixth segment all orange. Pubescence almost erect and 

 rather abundant on the discal portion of the second, third, and fourth segments, 

 but inconspicuous dark greyish yellow and longer in front of the shoulders ; 

 round the sidemargins there is a rather shorter stiff sloping pubescence 

 which is black where the margin is black but yellow where the margin is 

 yellow ; on the flattened margins between the disc and the sidemargins on 

 the second, third, and fourth segments there is only short depressed black 

 pubescence, on all the fifth segment the pubescence is pale and similar to 

 that on the disc of the preceding segments. Belly obscurely shining reddish 

 orange with a small black transverse spot (often resolved into two spots) on 

 the middle of the third and fourth segments ; pubescence consisting of long erect 

 whitish hairs, except on the flattened sides of the third and fourth and part 

 of the fifth segments where it is short black and depressed. Genitalia when 

 seen from above with a pair of broad soft orange side lamella3 which overlap 

 the broad but pointed middle piece. 



Legs shining black and orange ; coxte and trochanters black with con- 

 spicuous orange joints ; femora, after the joint, shining black for more than 

 the basal half, but the rest and almost all the tibitB and tarsi orange ; all the 

 tibiie however have a darkened incomplete ring about their middle, which 

 is usually blackish behind the anterior and in front of the hind pairs, and 

 the tarsi are obscurely blackish above the last two joints, and sometimes 

 so on the third, or even on the second, joint. Pubescence all pale yellow, 

 abundant and conspicuous on the middle femora especially behind the tip, 

 and fairly abundant behind and beneath the front femora, and beneath and 

 about the base of the hind femora ; the tibiae and tarsi bear only very tiny 

 adpressed yellow pubescence all over ; claws black at the tips. 



Wings (fig. 126)_ hyaline, with the base and foremargin brownish orange, 

 the usual strong veins being dark orange but the rest faint and almost colour- 

 less ; ciibital vein distinctly forked raUier beyond the middle of the submarginal 

 cell ; discal cell apparently pentagonal, because the lower side which slopes 

 from the lower cross-vein to the base of the second veinlet issuing from the 

 discal cell is almost straight ; discal vein not at all faint, and its fork branch- 

 ing at almost right angies to the stem ; third veinlet from the discal cell 

 sometimes absent, and sometimes not extended half-way to the wingmargin 

 and consequently not looped upwards like the others, while none of the veinlets 

 quite reach the wingmai-gin. _Alar squamae rather lai-ge, brownish orange, 

 with rather short orange marginal fringes on the basal part, but the fringe 

 becoming longer and more abundant towards the angle ; thoracal squamiu 

 much larger, and with no distinct margin, but all whitish yellow with whitish 

 yellow almost woolly pubescence all over and forming a long elegant marginal 

 fringe. Halteres yellow. 



