UEANOTJENIA GEOMETEICA 921 



and upper branch of fourth vein ; a short line of very broad metallic blue scales 

 at base of fourth vein, continued on fifth vein over about basal fourth of wing. 

 Halteres pale, with black knobs. 



Legs rather long and slender; vestiture blackish-brown with a slight greenish 

 luster and marked with white ; femora largely pale beneath, especially towards 

 base ; ends of femora with a large bluish-white patch above ; ends of tibise white 

 marked; fore tarsi with apex of first, both ends of second and base of third joint 

 narrowly white-ringed; mid tarsi with faint bandings at all the joints; hind 

 tarsi with last two joints entirely and apical fourth of third white; second and 

 third joints banded at base and apex, first at apex only. Claw formula, 

 0.0-0.0-0.0. 



Length : Body about 2.5 mm. ; wing 2.3 mm. 



Male. — Proboscis straight, rather long and slender, dilated toward apex, 

 labellse large ; apical portion with a few coarse bristles ; vestiture of dark-brown 

 scales. Palpi short, stout, clavate, almost hidden by the clypeus. Antennae 

 plumose, slender ; last two joints long and slender, brown, sparsely and coarsely 

 ciliate, the others shorter, pale luteous with apical white rings and black rings 

 at origins of basal whorls; hairs of basal whorls very long, yellowish-brown, 

 secondary whorls short and sparse; tori large, pale yellowish. Coloration as 

 in female. Abdomen somewhat longer than in the female, slightly thickened 

 at apex; ciliation sparse, coarse and irregular, yellowish, more abundant 

 towards tip. Wings narrower than in the female, the stems of the fork-cells 

 about the same length, vestiture similar. Claw formula, 0.0-0.0-0.0, one of the 

 claws of mid tarsi small and attenuated, the other large, broad and strongly 

 curved. 

 Length : Body about 2.5 mm. ; wing 2.2 mm. 



Genitalia (plate 37, fig. 250) : Side-pieces short and broad, slightly longer 

 than wide, tips conically rounded; basal lobe slight, low, setose. Clasp-fila- 

 ment as long as side-piece, strongly enlarged just beyond base and tapering 

 slightly to tip, which bears a minute terminal claw. Harpe-like appendages 

 slender, tapering, tips rounded. Harpagone-like appendages divided into a 

 number of stout basal teeth of equal length. 



Larva, Stage IV. — Head elongate, rounded, bulging at sides, front margin 

 with a sharp prominence each side of middle, a deep notch at insertion of 

 antennae. Antennae small, subcylindrical, stout, smooth, a single hair at basal 

 third; at tip four unequal coarse spines and a digit with a branch. Eyes 

 moderate, pointed. Both pairs of dorsal head-hairs single, very stout and thick. 

 Mental plate rounded triangular, with a triangularly pointed apical tooth and 

 seven on each side, the basal one small. Mandible quadrangular, arcuate on 

 outer side; four short filaments and a tuft of hairs in a hoUow some distance 

 before tip; a row of short stiff cilia surrounding dentition; dentition of two 

 large teeth followed by four short ones on a process, a large double tooth below 

 and another one near articulation ; a broad, irregularly serrate plate and two 

 slender filaments within ; a small process at articulation bearing four teeth and 

 a tuft of hairs ; a row of long hairs at base. Maxilla hemispherical, divided by 

 a curved suture ; inner half densely hairy, with two long spines on margin ; an 

 area of thick short conical spines at tip; outer half with two long filaments 

 at middle; palpus stout, as thick as half of maxilla, with four long digits on 

 pedicels. Thorax rounded, wider than long; hairs abundant, short subdorsal 

 tufts of mesothorax and metathorax short and stellate; subdorsal prothoraeie 

 tuft multiple. Abdomen moderate, anterior segments shorter; lateral tufts of 

 first two segments long, multiple, short and multiple on the other segments; 

 some of secondary hairs in series of distinct stellate tufts. Air-tube slender, 

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