68 Psyche [June 
all dark with the brilliant iridescence found on the femur. On the 
mid-legs the tibiz have the same dark iridescent scales except at 
the base where there is a small white spot, more easily seen on the 
ventral aspect; the first tarsal is dark, the second is mostly white 
but has a few dark scales, or they show dark reflections on the 
dorsal aspect, the third is also mostly white except the tip which 
is dark and on the dorsal side there may be a few scattered dark 
scales, the fourth joint is practically dark on the dorsal aspect and 
either whitish or ringed black and white on the ventral side, depend- 
ing on the position of the light, while the fifth joint is usually wholly 
dark, but may show light reflections on a few scales, on some 
specimens, depending on the angle of the light. The ungues on 
the fore- and mid-legs are large, unequal and simple. On the hind 
legs the tibiz are dark save for a brilliant white spot at the base, 
and so are the first tarsals but the white spot is much smaller, the 
second and third joints are dark, and the fourth and fifth are pure 
white (in some specimens a dirty white) with occasionally a tiny 
dark spot at the extreme tip. There is a line of porrect scales 
on the distal half of the tibia, extending on the first tarsal (H. D. 
& K.’s “scraper’’?). 
Wings are long and slender (285-50), the membrane clear and the 
veins clothed with ‘“Tzeniorhynchus”’ like scales, those on the 
costa, subcosta, and the fork of the second long vein almost obvate, 
and having a brilliant blue iridescence; the cells are very long and 
slender (80-5). First submarginal nearly one-third the length of 
the wing. The stems are proportionally short, not over one-fifth 
the length of the first submarginal and that of the second posterior 
slightly longer; the cross veins are nearly in a line, the mid and 
posterior about equal in length. The halteres have the base very 
light, but most of the stem and the knob are dark. 
Length: 6-6 mm. 
Taken: December 1, Larve found in a coconut shell. 
Habitat: Chagras Camp, Las Cascades, Canal Zone. 
The species lies near nivipes and of course may be digitatus but 
is believed to be new, in spite of the fact that what seems to be the 
same female is described by H. D. & K. as digitatus and the pecu- 
liarities of the male mid-legs are not referred to. 
Colonel W. H. Wilson, M. C., who sent me the specimens says 
they are markedly canabalistic, the larve eating not only the young 
of other species, but even the smaller members of their own species. 
