48 U.S. NATIONAL MUSEUM BULLETIN 244 



commentella, whose larvae have dark concolorous heads and whose 

 thoracic segments, though variably marbled in light and dark, are 

 not darkly striate on a glistening yellow background. 



Because Heylaerts' description of C. rileyi is so vague, this species 

 has been treated separately along with its original description (p. 144). 

 A more definite statement concerning the relationships of Heylaerts' 

 species will have to await the rediscovery of this insect from its type 

 locality, Missouri. 



Material examined. — -IScf cf, 3 99, 66 cases: 



UNITED STATES: Delaware: Oak Orchard, 9 , Sept. 18; 35 cases, USNM. 

 Sussex County, 4 cf cf , Sept. 3-12, USNM. District of Columbia: Washing- 

 ton, cf, July, USNM. Florida: Ft. Myers, d", Jan. 15, USNM. Mississippi: 

 Pearl, Rankin Co., cf, Oct. 15, USNM. North Carolina: Wilmington, cf, 

 Oct. 17; 2 cf cf with cases, Oct. 12-14; ? , Sept. 20; 23 cases, USNM. South 

 Carolina: Whitaker, case, USNM. Virginia: Accomac County, case, USNM. 

 Chincoteague, case, USNM. Vienna, cf , type, Sept. 28, USNM. Wachapreague, 

 5 cases, USNM. West Virginia: Jefferson County, 2 cf cf with case, Sept., 

 USNM. 



7. Naevipenna, new genus 



Platoeceticxis, in part, of authors. 



Type of genus. — Platoeccticus aphaidropa Dyar, 1914. 



Male. — Antennae broadly bipectinate, pectinations gradually 

 diminishing in length to apex; segments short near base, gradually 

 lengthening toward apex, pectinations arising from middle of segment 

 or slightly beyond. Prothoracic leg with long, slender epiphysis. Meso- 

 and metathoracic legs each with smgle short apical spur. Tip of 

 abdomen slightly exceeding hind margin of secondaries. 



Wings (fig. 155) uniformly scaled, 12- and 8-veined. Apex of fore- 

 wings rather acute, prominent, sclerotized costal stigma directly 

 above apex of discal cell; R2, 3, and 4 stalked, R5 either separate or 

 connate at base; Mo and 3 stalked; medial vein undivided within cell 

 of both wings; anal veins similar to Cryptothelea, spur of 3 A absent. 

 Secondaries with Sc-f Ri and Rs fusing at point midway along cell 

 and then immediately separating to continue as parallel veins to 

 margin ; M2 and 3 stalked as in primaries. 



Male genitalia. — Tegumen apex acute and entire. Valves 

 broad, margins strongly revolute; pulvilli weak; apex of sacculus 

 minutely spined. Vinculum abruptly tapering to elongate, rodlike 

 saccus. Aedeagus smiple, without basal expansion. Eighth sternite 

 (fig. 194) with broad base; fm'cal arms parallel, short. 



Female. — Unknown. 



Discussion. — This genus and species is superficially very similar to 

 Cryptothelea (especially C. nigrita), but differs greatly in the structure 

 of the wings, the armature of the legs, and the male genitalia. In the 



