234 THOMAS SAY FOUNDATION 



14, 1898, Ithaca, N. Y. ; Oct. 16, 1923, Montreat, N. L 

 (C. R. Crosby and S. C. Bishop). 



Leuctra truncata Claassen. 



(Plate 40, figs. 3, 4; plate 42, fig. 3.) 

 1923. Leuctra truncata Claassen, Can. Ent., 55:263. 



Length to tip of wings, male, 7 mm. ; female, 8.9 mm. 

 Expanse, male, 12.5 mm.; female, 15-17 mm. 



General color brown. Head wider than prothorax, uni- 

 formly brown, occiput slightly rugose ; hind ocelli be- 

 tween two and three diameters distant from eyes. Pro- 

 thorax brown, a little wider than long, slightly narrowed 

 behind ; median longitudinal field about one-fourth the 

 width of entire pronotum ; sides of disc moderately rugose. 

 Legs brown, wings subhyaline. 



Male. Seventh abdominal tergite smooth ; eighth ter- 

 gite bearing near the anterior margin a short median, 

 truncate, chitinous projection, about as wide as long; 

 supra-anal lobe short, triangular; cerci unmodified; sub- 

 anal lobes quite slender; titillators considerably shorter 

 than subanal lobes; ventral lobe very little longer than 

 wide. 



Female. Eighth abdominal sternite slightly produced 

 into a broadly notched bilobed subgenital plate, the lobes 

 rounded and bearing long hairs. 



Holotype, male, allotype, female, Aug. 9, 1905, Old 

 Forge, N. Y. (Cornell University Collection) ; also many 

 males and females from same locality as type. 



Genus PERLOMYIA Banks. 



1906. Ferlomyia Banks, Can. Ent., 38:338. 



1907. Ferlomyia Banks, Cat. Neurop., p. 14. 

 1909. Ferlomyia Enderlein, Zool. Anz., 34:394. 



Very closely allied to Leuctra. Small blackish forms 

 not over 15 mm. in length. 



Head wider than prothorax, blackish, with three ocelli ; 

 hind ocelli closer to eyes than to each other; just back 

 of hind ocelli a transverse depression ; surface of head 

 covered with fine pile ; antennae brown or blackish ; max- 

 illary palpi large. 



Prothorax distinctly longer than wide; front angles 

 and margin rounded ; surface only moderately rugose. 

 Legs brown or blackish ; middle tarsal segment short, first 

 and third tarsal segments subequal in the prothoracic 

 legs ; in meso- and metathoracic legs the first tarsal seg- 

 ment is longer than the third. Wings subhyaline or 



