68 Psyche [June 



all dark with the brilliant iridescence found on the femur. On the 

 mid-legs the tibiae 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 tibiae 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 " Tseniorhynchus " 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, Larvae 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 larvae eating not only the young 

 of other species, but even the smaller members of their own species. 



