162 
Philippine Journal of Science 
1919 
I attach a good deal of importance, taxonomically, to the clawlike 
spines on the basal tarsus of the hind legs. In Psyllinse there 
are two such “claws,” in Triozinse none, while in Carsidaringe 
there is one “claw.” In Homotoma, however, there are usually 
two and in Mycopsyllct there appear to be two. In some other 
respects, also, this is somewhat of an aberrant genus, but it is 
retained in this subfamily, for the present at least. 
Key to the species. 
a 1 . First marginal cell much smaller than second or wanting; radius and 
media quite or nearly contiguous for a greater or less length; ptero- 
stigma wanting. 
b 1 . Medial vein contiguous with radius for about one-half length of 
latter, leaving an open cell between them on costal margin. 
c\ First marginal cell present; a black band following radius to 
margin and another following cubitus. (Formosa.) 
H. radiatum Ivuwayama (’08: 181). 
c 2 . First marginal cell wanting; the two black bands wanting, but 
radial vein prominently black. (Bengal.) 
H. distincta Crawford (’12: 433). 
6 2 . Medial vein contiguous with radius for nearly or quite the entire 
length of latter, leaving no cell or only a very small one between 
them; a black band following radius and media, and a second one 
following cubitus; first marginal cell present but small. 
c J . Insect large, 6 millimeters long to tip of folded wings; antenme 
terete, without carinas; costal margin of forewing roundly arched, 
wing nearly half as broad as long. (Philippines and Straits Set- 
tlements.) - - H. bakeri Crawford (’15: 263). 
c\ Insect smaller, about 3 millimeters long to tip of folded wings; 
antennse carinate; costal margin of forewing much less arched, 
wing about one-third as broad as long. (Philippines.) 
H. bilineata Crawford (’17: 164). 
ci. First marginal cell nearly as large as second; radius and media not 
contiguous; pterostigma present; wing veins margined with black; 
antenna5 carinate. (Philippines.).... H. pacifica Crawford (’15: 262). 
Homotoma bakeri Crawford (’15: 263). 
A single male has been taken by C. F. Baker on Penang 
Island, Straits Settlements. As the original description of this 
species was drawn up from a female example, the male genitalia 
are here described. 
Male. — Forceps as long as anal valve or longer, basal half 
with a carina on outer face, distal half enlarged, somewhat 
spearhead-shaped with tip bluntly rounded. Anal valve very 
slender in distal half, base broader. 
Hind wings in both sexes very small and almost nerveless. 
