SPONGILLA-FLIES — PARFIN AND GURNEY 457 



Legs (fig. 8,r,H) : Tibiae cylindj-ical, first tarsal segment the 

 longest, particularly in metathoracic legs, where it is more than 

 one-third the length of tarsus, fourth the shortest. 



FoREWiNG (fig. 10, a): Costal area with approximately 11-16 costal 

 cross-veins before pterostigma; subcostal area usually slightly narrower 

 than the greatest wndth of costal area, with one basal subcostal cross- 

 vein usually present below about the fourth to sixth costal cross-veins, 

 and sometimes one appearing to be present distally connecting Sc to 

 Rl; coalescence of Sc with Rl at apex of wing below the pterostigma 

 uncertain, sometimes Sc appearing to atrophy at the apex; Rs+MA 

 separating off from Rl near base, Rs separating from MA slightly 

 basad of 1st r; free stem of Rs wdth two main forks, R4 + 5 separating 

 off at about longitudinal midpoint of w^ing, R2 and R3 forking a short 

 distance beyond; MA usually dividing into two branches slightly 

 basad (occasionally distad) of level of junction of Sc and Rl; MP 

 forking into MPl+2 and MP3+4 a short distance beyond separation 

 of Rs from MA; MPl+2 and MPS +4 with terminal fork usually 

 basad of level of junction of Sc and Rl ; Cul separating from Cu2 near 

 base of wing; 1st and 3d A sometimes, and 2d A usually, with marginal 

 forking, 3d A running free to margin; two or three radial cross-veins 

 between Rl and Rs; one radiomedial cross-vein between Rs or R4-|-5 

 and MA, usually at base of R4 + 5; one medial cross-vein between 

 MA and AIPl-|-2; three mediocubital cross-veins between MP and 

 MP3+4 and Cul, the first basal, the second to Cul before branches, 

 and third to branches; one cubital cross-vein between Cul and Cu2; 

 one basal cubito-anal cross-vein between Cu2 and 1st A; one anal 

 cross-vein between 1st and 2d A; no real gradates, inner series 

 usually of two cross-veins (three in panama), 2d r and 1st r-m. 



HiNDWiNG (fig. 10, b): Costal area with approximately 9-12 costal 

 cross-veins before pterostigma; subcostal area broader with an in- 

 distinct basal subcostal cross-vein; Sc usually appearing to be coalesced 

 with Rl at apex; Rs after branching off from Rl near base, continuing 

 free for a shorter distance than in Climacia, then coalescing with and 

 finally separating from MA close to the longitudinal midpoint of wing, 

 then proceeding anteriorly back toward Rl, forking into two main 

 forks, R4+5 near center of wing, and, a short distance beyond, R2 

 and R3, basad of pterostigma; MA separating off from MP closer to 

 base than in Climacia into a free sinuate section, which curves toward 

 and coalesces with Rs, then separates and forks at margin; MP 

 forking into MPl + 2 and MP3+4 usually basad of point of separation 

 of Rs from MA; MPl+2 usually with terminal fork basad of level of 

 point of coalescence of Sc and Rl; Cul separating from Cu2 near base 

 of wing; 1st A usually simple, 2d A usually with marginal forking; 

 one or two radial cross-veins, the first distad of forking of R2 and R3, 



