OF WASHINGTON, VOLUME XV, 1913. 19 



female specimen as a narrow-winged variety of tantalea. I do this 

 with some diffidence, realizing the difficulties, but at the same time 

 remembering that it is the business of systematic entomology to 

 detect these differences and record and interpret them. The male 

 specimen of tantalea has the distal joint of the flagellum somewhat 

 shorter than the proximal funicle joint; the joints are finely, 

 longitudinally striate; the line of fovese on the scutellum is com- 

 posed of two obliqued straight lines on each side of the meson, 

 meeting at the meson. The line appears to be a broad, convex 

 curve in the variety. In tantalea the length of the longest marginal 

 cilia of the fore wing is equal to about a fourth of the wing's 

 greatest width. The caudal marginal cilia of the posterior wing 

 are very long, longer than the longest cilia of the fore wing. The 

 forewings are broader than those of the North American sibylla, 

 with shorter marginal fringes. 



Polynema tantalea longipenne, new variety. 



Female. Ferruginous, the distal five antennal joints, the distal tarsal 

 joint, the intermediate and posterior tibiae, the basal portions of the cephalic 

 tibiae, the marginal vein, and the head black or blackish. Funicle joints 

 1 and 2 suffused with dusky. Fore wings slightly stained at the distal 

 half of that portion of the blade distad of the venation. Proximal funicle 

 joint subequal in length to the pedicel, not quite half the length of the 

 second joint, which is a fourth longer than the third; funicle joints 4, 5, 

 and 6 subequal, each a fourth shorter than the third and distinctly longer 

 than the first, the club not quite equal in length to the two preceding 

 joints combined. Fore wings nearly as in Polynema sibylla, but the mar- 

 ginal cilia are shorter. 



Like tantalea, except as noted above in regard to its fore wings 

 and probably the foveate line across the scutellum. 



Described from a single female specimen received from Mr. 

 Swezey and labeled ''Polynema tantalea Perkins, Kaumuchona, 

 < )ahu, 12.5.07. 0. H. S." 



Habitat: Sandwich Islands, Oahu (Kaumuchona.) 



Type: Cat. No. 15252, U. S. National Museum, Washington, 

 D. C., one female in xylol-balsam (mounted with a male specimen 

 of tantalea). 



The foregoing male of tantalea was collected by Mr. Swezey at 

 Tantalus, Oahu, October 15, 1911. 



Thus we have seen four common species of Polynema indig- 

 enous to Hawaii which are distinct from native North American 

 and Australian species of the genus, so far as is known ; also from 

 native European species of the genus so far as my limited knowledge 

 of these latter goes. Also, it has been shown that there is a relation 

 between the species so far known to exist in several continents 



