85 



darkest at apex; knee spots yellow, large, distinct; tibia darker, yellow beneath; 

 metatarsi and tarsi blackish-brown, hind metatarsi not so long as the tibia; ungues 

 equal. Formula 1.1 — 1.1 — 1.1. 



Length 7 mm. 



Male: Proboscis slender, straight black violet. Palpi exceeding the proboscis 

 about the length of the last joint; end of long joint and the last two joints thickened, 

 the long joint coated above with greyish scales; this and the two last joints bearing 

 long greyish hairs. Antenna? plumose, the last two joints long and slender, black 

 with white rings; hairs of whorls long, dense, black with greyish lustre. Coloration 

 of head and thorax similar to that of the female, but the dark lines of the meso- 

 thorax more obsolete; coloration of abdomen similar to the female, but the ex- 

 pansion of the bands in the middle line often rather inconspicuous. Lateral hairs 

 very long, dense and yellow. Wings narrower than in the female, stems of the fork 

 cells longer. Legs as in female. Claws on the fore and midlegs unequal; on the 

 forelegs the large ones with two teeth, the smaller with only one; on the midlegs 

 both claws with two teeth; the inner tooth of the smaller one small; the large claw 

 strongly curved and highly developed; claws of hindlegs equal and with only one tooth. 



Male Genitalia: Side pieces with parallel curved outer and inner edges, 

 about thrice as long as wide, slender; the whole side piece being narrow, forming 

 the arc of a circle; Clasp-filament long, slender, curved not swollen medianly, 

 with a long articulated terminal curved spine; apical lobe of ventral flap indistinct, 

 distal part of basal lobe prolonged into a narrow arm-like projection with an ex- 

 panded hand-like end; tuft at the base of the basal lobe with extremely long brist- 

 les extending along the ventral flap as a fringe of very long hairs. Harpes slender, 

 rather long, margins narrowly revolute. Harpagones with a stout thick curved 

 columnar base with small seta* on inner side; distal joint spatulate. Unci approxi- 

 mate, revolute, forming an indistinct basal cylinder; basal appendages stout and pro- 

 minent, bearing a row of stout seta; at tip. 



This very characteristic species, in the female sex easily recognizable by the 

 white middle line on the abdomen, in the male sex by the genitalia, and in the 

 larva by the characters of the sipho, is probably rather common at all events in 

 North Seeland. 



Larva. Head rounded, wider than long, narrowed before eyes; a notch at in- 

 sertion of antenna'; front margin arcuate. Antenna extremely short, straight, spinose; 

 antenna] tuft small, inserted almost in the middle of the antenna?; at the apex two 

 small hairs a long hair and a digit; anteantennal tuft multiple, lower frontal tuft 

 triple, upper double; epistome with a ver}' characteristic coloration of- the head 

 integument. Eyes well-developed. 



Thorax much wider than long, rounded; hair formula of frontal border 

 5141331415 or 4131331314; hair 1 after median tuft 3 short, lateral hairs highly 

 developed; most of them in large multiple tufts, some of them single. 



Abdomen moderate, the first segments much shorter than the last: lateral hair- 



