ORTHOPODOMYIA PHYLLOZOA 881 



first veins, nearly equidistant, the first spot about one-third the distance from 

 wing-base, the fourth near apex, the second the largest; a long basal line on 

 first vein, reaching close to first costal spot; second vein with a spot at base 

 of fork and at apex of each branch ; a spot on second, third, and fourth veins 

 below second costal spot ; fourth vein with a spot at base of fork and at apex of 

 each branch ; fiJth vein with a spot at base of fork, another on the upper branch 

 and at its apex; sixth vein with an apical spot; fringe unspotted. Halteres 

 pale yellowish, the knobs with a few similarly colored scales. 



Legs long, rather slender; vestiture black, marked with ocherous yellow and 

 white ; tibiae with numerous large yellow spots, giving a banded effect ; femora 

 with ocherous-yellow scales predominating; knees whitish scaled; first tarsals 

 of all the legs with a few irregular spots of yellowish scales ; fore tarsi without 

 distinct rings ; mid tarsi with bases and apices of first and second joints silver- 

 white ringed, third joint white at base, fourth and fifth dorsally white ; hind 

 tarsi with apex of first joint broadly white-ringed, second with base broadly 

 and apex more narrowly white-ringed, apex, base and apex of third, base of 

 fourth and all of fifth joints silvery-white. Claw formula, 0.0-0.0-0.0. 

 Length : Body 3 mm. ; wing 3 mm. 



Male. — Proboscis straight, rather slender, slightly dilated towards tip ; vesti- 

 ture black, labellae silvery, a patch of yellowish scales close to apex and a yellow 

 ring before the middle. Palpi somewhat shorter than the proboscis, very 

 slender, uniform, a few long setae at apex; vestiture dull black with some 

 scattered pale scales; long joint with yellow rings at base and middle, silverj'- 

 white scaled at its apex, the succeeding joint silver-scaled at apex. Antennae 

 plumose, the last two joints long and slender, rugose, pilose, black, the others 

 short, pale, with black rings at insertions of hair-whorls ; hairs of whorls long, 

 moderately abundant, brown with yellow silky luster. Coloration as in the 

 female. Abdomen subcylindrical, slightly longer than in the female, the cilia- 

 tion hardly more abundant. Wings slightly narrower than in the female, the 

 stems of the fork-cells longer. Claw formula, 1.0-1.0-0.0. 



Genitalia (plate 35, fig. 236) : Side-pieces over twice as long as wide, 

 conically tapered, with a low rounded basal lobe bearing three long stout spines ; 

 clasp-filament uniform, moderate, with a row of setae on inner side and a long 

 articulated terminal spine. Harpes concave, inner margin revolute, tip divided 

 into several teeth. Unci forming a basal cylinder, the tips dentate inwardly. 



Larva, Stage IV (plate 129, fig. 448). — Head rounded, broader than long, 

 widest in the region of the eyes. Antennae rather long, slender, nearly uni- 

 form, smooth, the tuft slightly before middle, ample; two of terminal spines 

 long. Dorsal head-hairs and ante-antennal tufts in long multiple tufts, all 

 lying in a curved transverse line. Abdomen with a large quadrate dorsal plate 

 on seventh segment, a long narrow one on eighth segment, reaching well down 

 the sides before the comb; comb of narrow fringed scales in a double row, basal 

 row of many scales, posterior row of three longer ones only. Air-tube long and 

 slender, about eight times as long as wide, tapering outwardly and bearing a 

 single tuft before middle. Anal segment longer than wide, ringed by the plate ; 

 dorsal tuft a long hair and tuft on each side; lateral tuft small, four-haired; 

 ventral brush well developed, confined by the chitinous ring ; anal gills lanceo- 

 late, the lower pair about as long as segment, the upper pair longer. 



The larvae live in the water between the leaves of BromeliaceEe. Mr. Busck 

 bred the type specimen from a bromeliad, Mr. Jennings met with the larvs five 

 times in such situations, and Mr. Picado has also bred this species from 

 epiphytic bromeliads. 

 Panama and Costa Eica. 



Tabernilla, Canal Zone, Panama, June 25, 1907 (A. Busck) ; Fort San 

 Felipe, Porto Bello, Panama, January 21, 1908 (A. H. Jennings) ; Caldera 



