SPONGILLA-FLIES — PARFIN AND GURNET 517 



fore wing, and the comparatively deep forking of Rs into 112+3 and 

 R4+5 from the margin in the right hindwing of the holotype of 

 chilena are abnormahties cannot be definitely ascertained until fm*- 

 ther material is procured. 



Genus Sisyrina Banks 



Sisyrina Banks, 1939, p. 470. Genotype: Sisyrina nirvana Banks, by raonotypy 

 (Banks, loc. cit.). 



Brownish spongilla-fiies. 



Head: Antenna with basal segment longer than broad, second 

 segment only slightly longer than remaming segments of flagellum; 

 face short; maxillary palpi with terminal segment long, broader 

 basally, acute apically (fig. 7,i). 



Thorax: Pronotum truncate, broader than long, anterior margin 

 considerably shorter than posterior, transverse grooves; m general 

 similar to Sisyra. Tarsi with basal segment more than one-third 

 length of tarsi. 



FoREWiNG (pi. 1, fig. 7): Costal area with about nine or ten costal 

 cross-veins before the pterostigma; subcostal area almost as broad 

 as broadest width of costal area, with a basal subcostal cross-vein 

 below about fifth costal cross-vein and possibly another weak one 

 below pterostigma; Sc atrophying at apical end with coalescence with 

 Rl uncertain; Rs+MA separating off from Rl near base, Rs separat- 

 ing from MA basad of 1st r; free stem of Rs with two main forks, 

 R4 + 5 separating off near longitudinal center of wing, with R2 and 

 R3 forking slightly distad; MA forking under pterostigma; MP fork- 

 ing into MPl-f2 and MP3+4 at base of wing and with terminal 

 forks basad of pterostigma; Cul separating from Cu2 near base of 

 wing; 3d A running free to margin; sometimes three radial cross-veins 

 between Rl and Rs; two sectoral cross-veins, one between R2 and R3 

 and the second between R3 and R44-5; two radiomedial cross-veins; 

 three medial cross-veins between MA and MP, one between MPl+2 

 and MP3+4; three mediocubital, one cubital, one cubito-anal and 

 one anal cross-vein; two inner and seven outer gradates almost in 

 regular series (except 1st s sometimes) ; thjTidia present at point of 

 forking of MPl + 2 and MPS + 4 and on outer gradates except 3d r 

 and 3d m-cu. 



HiNDWiNO (pi. 1, fig. 7): Costal area with approximately eight costal 

 cross-veins before pterostigma, with area immediately preceding 

 pterostigma almost free of cross-veins; subcostal area broader than 

 costal area with one basal subcostal cross-vein; Sc fading at apex, 

 strong basally; Rs coalescing with MA for a longer distance than in 

 forewing and separating from MA in center of wing and forking into 

 two main forks, R4-f 5 near center of wing and a short distance beyond, 



