68 



Legs moderately long and slender, dark, brightest below, no conspicuous knee- 

 spots; covered with numerous white scales, especially conspicuous upon hind tibia 

 and tarsi. 



Size 5'5 mm. 



Male: Palpi and proboscis, black; end of long joint swollen, black, sprinkled 

 with white hairs. Abdomen broadest on sixth to seventh segment; coloration similar 

 to the female; lateral filiation long, abundant, pale; wings narrower than in the 

 female; stem of the fork-cells longer. 



Size 6'o mm. 



Male genitalia: Side pieces almost three times longer than wide, tapering di- 

 stally; apical lobe well developed with some few, rather short hairs. Clasp filaments 

 slender, slightly expanded in the middle and bearing a long articulated terminal 

 spine; a few extra large bristles at proximal end of the basal lobe; stem of har- 

 pago long, blade strap-shaped, not much shorter than stem. 



Larva: Head rounded, wider than long, a notch at insertion of antenna?; 

 front margin arcuate. Antenna' short, antennal tuft small, only with from five to 

 seven hairs inserted below the middle of antenna; on apex four hairs, two long, 

 and a digit. Anteantennal tuft multiple; lower frontal tuft consisting of two or three 

 hairs, upper of one. Eyes large. 



Thorax subquadratic angled at hair-tufts, hair-formula of frontal border 

 311144113; in tuft four two long and two short hairs. Lateral hairs in multiple 

 tufts and some single strong hairs. Abdominal segments rather broad, the first of 

 them shorter than the last. Lateral hairs on the first two segments four or three, 

 on the others, two; subdorsal hairs in double tufts. Tufts of eighth segment in 

 common arrangement; lateral comb consisting of about twenty-five scales, arranged 

 in a triangular area; scales blunt, without any peculiar, developed median tooth. 

 Sipho rather short, not fully three times longer than broad, tapering at apex. At 

 basal third a pecten consisting of about twenty thorns, all in line and with from 

 five to six teeth of unequal length at base; a tuft of hairs between end of pecten 

 and apex. 



Anal segment longer than wide; the dorsal plate subcjuadratic, not covering the 

 two thirds of the segment; dorsal tuft large, two very long still' hairs beneath; ven- 

 tral brush consisting of about fifteen rays, every ray carrying from seven to nine 

 hairs. Before the barred area two or three free tufts; Anal gills four, extremely short, 

 bud-shaped, equal, almost isodiametric. 



Lateral tufts of labium short but dense; the inner part with a crown of comb- 

 hairs; palatum large, covered with long soft hairs. Mandibles quadrangular with 

 two strong spines before the collar; a row of short cilia from a collar. About ten 

 thorn-like bristles from margin, the last very strong, curved; dentition five, strong, 

 blunt thorns and one longer, more acute; long cilia below thorns. Process below 

 indistinctly furcate with strong hair-tufts on tips and a group of hairs at base. 

 Maxilla? elliptical, at apex a brush of very long hairs; a seta near the apex; near 



