SPONGILLA-FLIES — PARFIN AND GURNEY 493 



laterally to level of about sixth costal cross-vein, then narrowmg 

 posteriorly to MP with a clear space next to Rs+MA; the second, the 

 oblique antepterostigmal spot, directed basally, beginning and 

 broadest at costa and narrowing to MPl + 2, the two areas more or 

 less interconnected by intervenational streaks from Rs to MP; the 

 less prominent brownish area, beginning at dark postpterostigmal spot 

 to basal branches of Cul and MPS +4, with apical portion along 

 outer and inner margins of wing and region below radiomedial streak 

 with light brownish streaks between longitudinal veins, darker spot 

 over Cul; narrow center of pterostigma between antepterostigmal and 

 postpterostigmal spots yellowish covering three or four costal cross- 

 veins; longitudinal and cross-veins in general pale in pale areas and 

 dark in dark areas; Rs and MA forked below pterostigma near margin; 

 MPl + 2 with first branch forked frequently at an angle, closer to 

 stem of MP than second fork; Cul with three to five branches to 

 margin (three most often) ; three radial cross-veins, 1st r from Rl to 

 Rs or Rs+MA, 2d r slightly distad of center of wing; 3d r distad of 

 2d r but before level of point of coalescence of Sc and Rl, making cell 

 2d Rl between 2d r and 3d r usually not more than two or three times 

 as long as wide; 2d r-m usually distad of 3d r between R2+3 and 

 MA forks; 1st r-m usually directly above 2d m between AlA and 

 MPl + 2, and basad of 2d m; 3d m between MA and MPl + 2 basad 

 of MPl+2 fork, close to 2d m, the cell between not more than three 

 or four times as long as broad; five outer gradates in irregular series, 

 usually no sectoral cross-vein; inner gradates also in irregular series. 



HiNDWiNG (pi, 2, fig. 3): Average length female 4.2 mm., male 3.4 

 mm., average width female 1.6 mm., male 1.2 mm.; membrane hyaline 

 to yellowish; three dark brown spots, the first, basal from costa to 

 Rs+MA, interconnecting with the second, the broad antepterostigmal 

 spot, and the third a postpterostigmal spot, with light brownish shading 

 distally along outer and inner margins from postpterostigmal spot to 

 Cu2; pale area in pterostigma narrow, covering approximately four 

 costal cross-veins; in general, longitudinal and cross-veins dark in 

 dark areas and pale in pale areas, the pale and dark areas comparable 

 to those in forewing; Rs usually forking into R2 + 3 and R4 + 5 basad 

 of point of coalescence of Sc and Rl ; Cul with two or three branches to 

 margin; six outer gradates. 



Male genitalia (fig. 21,a-d): Eighth tergite longer dorsally, with 

 numerous setae laterally between tergite and sternite creating effect 

 of long and broad sternite (lateral setae between tergites and sternites 

 abundant) ; ninth tergite much shorter dorsally, anterior margin con- 

 vex, posterior margin almost straight; tenth tergite with each half of 

 almost uniform length throughout, slightly longer dorsomedially and 

 with ventral border projected slightly posteroventrally; ninth sternite 

 with a pair of irregularly margined blunt median processes extending 



