156 Philippine Journal of Science m* 



ened and sometimes very hairy. Thorax not strongly arched. 

 Hind tibia? usually with a spur at base and spines at apex; 

 basal tarsus of hind legs usually with one black claw (two in 

 Homotoma, but the relationships of this genus are not clear). 

 Forewings always membranous and hyaline, usually more or 

 less acutely pointed, often with a veinlike callus or two con- 

 necting veins distad. There is a scarcely definable, characteristic 

 manner of branching of medial and cubital veins. 



Although I have seen no representatives of certain Autralian 

 genera, the illustrations and descriptions of these point to an 

 affinity with Carsidarinse so clearly that they have been included 

 here, tentatively. Homotoma is an old genus and still of very 

 doubtful relationship. The presence of two claws on the basal 

 tarsus of the hind legs is distinctly a characteristic — and appa- 

 rently an important one — of Psyllinag and not of Carsidarinse. 

 The genae, also, often are produced into distinct cones. It is 

 possible that the genus should be referred to another subfamily, 

 but for the present at least it may be retained here. 



Key to the genera. 



a 1 . Cubitus and media with common stalk (cubital petiole). 



b\ Antennae thick throughout, not longer than body to tip of abdomen. 

 c\ Antennas thickly hirsute and often carinate; genae usually with 

 conical processes directed downward on each side of clypeus. 



Homotoma Guerin. 

 e\ Antennae not hirsute, nor carinate, but terete; genae not produced 



into cones Epicarsa Crawford. 



o\ Antennae slender at least beyond third segment, usually distinctly 

 longer than body (except in Macrohomotoma) , not hirsute. 

 e 1 . Head birostrate in appearance, by the projection forward of genae 

 on each side of midline and attachment of antennae at end of 

 projecting genae. 

 <2\ Outer anterior angles of vertex elevated above genae, more or 

 less hornlike; insect usually very large. 

 e\ Female genitalia with ventral valve nearly as long as dorsal, 

 latter without thick fringe of hairs; vertex produced into a 

 large horn over each antennal socket; hind tibiae without 

 basal spur, with very large spines at apex; first antennal 

 segment very long; forewing with marginal cells nearly 



equal in size - Dynopsylla Crawford. 



e*. Female genitalia with ventral valve very short, dorsal valve 

 many times larger and very thickly fringed with stiff hairs 

 along ventral margin, vertex sharply angled but not produced 

 into horns in front; hind tibiae with basal spur; first marginal 

 cell of forewing much smaller than second. 



Thysanogyna g. nor. 

 cP. "Vertex not as above. 



e\ Forewings with pterostigma, hind tibiae usually with basal 

 spur; antennae very long and slender. 



