8 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 08 



TYPHLOCYBA UNCA. new species 



Male. — Color as in T . piscator the tegmina somewhat more densely 

 whitish, the clouds in front of cross veins slightly larger. Hypopy- 

 gium: Upper posterior angle of ninth segment produced and mod- 

 erately angulate, the lower well rounded. Claspers of the same 

 type as in uhni and teneiTzma, the angulate shoulder on outer side of 

 outer clasper not quite so prominent. Aedeagus stout, a superior 

 view showing two divergent acute processes from base which are 

 as long or a little longer than central process; the latter is again 

 subdivided at about its middle, emitting two rami which at first are 

 abruptly divergent, then parallel, and ultimately slightly outcurved 

 and acute; the central shaft continues beyond them and is slightly 

 enlarged subapically and recurved and bifid apically (figs. 18-20). 



Female. — Dusl^ markings usually less distinct than in male. 

 Eighth sternite slightly emarginate both laterally and medially. 



Length, 3 mm. 



Holoty:pe.—M2i\Q, Mount Washington, N. H. (E. D. Ball) ; Allo- 

 type, female and paratypes, both sexes, Ames, Iowa, June 19, 1897 

 (State Coll. Iowa) ; Paratypes of both sexes, Salem, N. Y., June 27, 

 1924, on birch, E. D. Ball (Ball) ; and Glencarlyn, Va., June 11 to 

 21, 1925, J. R. Mallach (McAtee). 



Group 2 



Besides the characters mentioned in the key, it may be mentioned 

 that the aedeagus in species of this group is seldom bifid and rarely 

 caliper-like or trifid. 



KEY TO THE SPECIES OF GROUP 2 



1. Forms with distinct, though sometimes not extensive dark marlvings 



on tegmina 2 



— Forms without dark markings on tegmina 13 



2. Darlf markings consisting only of spots near cross veins or of a band 



across these veins 3 



— Dark markings otherwise 9 



3. With dusky spots only 4 



— With a band over cross veins S 



4. Males 5 



— Females 7 



5. Apices of inner claspers directed inwardly, often projecting between the 



outer claspers (figs. 40-41) ; aedeagus as in Figures 41—42, flavoraarginata 



Gillette and Baker, p. 17 



— Apices of inner claspers directed outwardly 6 



6. Outer clasper with a single long bristle near base (fig. 54) ; ninth segment 



unusually long as seen from side (fig. 55), its posterior margin not 

 sinuate ; aedeagus as in Figures 56-58 gillettei Van Duzee, p. 23. 



— Outer clasper without such a bristle; ninth segment not unusually long, 



its upper posterior angle produced, the posterior margin sinuate ; aedea- 

 gus as in Figures 77-78 antigone, new species, p. 35 



