SPONGILLA-FLIES — PARFIN AND GURNET 



455 





Figure 9. — Head and mouthparts of Sisyra vicaria (Walker), A, C, E, F, and Climacia 

 areolaris (Ha gen), B, D, G, H. A, B, posterior view of head, showing cranial sulcus (cs) 

 and postoccipital margin of foramen (pof); C, D, labrum; E, G, right m.andible, ventral 

 view; F, H, left mandible, ventral view. 



Key to the genera of Sisyridae 



1. A series of outer gradate cross-veins present in fore- and hindwings ... 2 

 No series of outer gradate cross-veins present in either wing 4 



2. Rs of fore- and hindwings usually v.ath one main fork under or slightly 



basad of pterostignia; forewing with 3d A running into and uniting with 

 2d A near margin (North, Central, and South America) (p. 480). 



Climacia McLachlan 



Rs of fore- and hindwings usually with two main forks, both basad of 



pterostigma; forewing with 3d A not fusing with 2d A, but running to 



margin 3 



3. Forewing usually with well-developed inner gradate series of 4-G cross-veins 



below 2d r; Sc appearing to run free to margin, joined by a cross-vein to 

 Rl (Rophalis Hagen, fossil in Baltic amber, p. 522). (Algeria, Australia, 

 Balearic Islands, Bulgaria, Corsica, Italy, Japan, Sardinia, Sicily, Spain) 



(p. 520) Nearorthus Costa 



Forewing usually with poorly developed inner gradate series of only two or 

 three cross- veins; Sc indistinct in pterostigma (Southern India) (p. 517). 



Sisyrina Banks 



