166 INSECUTOR INSCITI^ MENSTRUUS 



fringe; anal segment ringed by the plate; air-tube delicate, 

 pointed at the tip, about three times as long as wide, the pecten 

 of four scales at the base, followed by a large 10-haired tuft. 

 The anal gills are missing in the specimen ; the small rounded 

 distinct tracheae run into the air-tube. 



The known larvae may be separated as follows : 



Anal segment ringed by the plate. 



Pecten of air-tube with detached teeth outwardly; lateral comb of 



eighth segment in a large triangular patch fulviis Wiedemann 



Pecten of air-tube uniform; lateral comb with scales in a nearly 

 straight row. 



Air-tube short and thick. 



Lateral comb with about ten scales (9-11). 



Hair tuft of tube at end of pecten or beyond it, 



serratus Theobald, nubilus Theobald 

 Hair tuft well within the pecten, 



tormentor Dyar & Knab 



Lateral comb of six scales atlanticns Dyar & Knab 



Air-tube long and slender. 



Air-tube pecten of four scales oligopistus Dyar 



Air-tube pecten of about eight scales ; anal gills very long 



and coarsely tracheate dupreei Coquillett 



Anal segment not ringed by the plate knahi Coquillett 



The larvae of eucephalaeus, hastatus, hortator and mathisi 

 are unknown. 



NEW AMERICAN MOTHS 



(Lepidoptera) 



By HARRISON G. DYAR 



Family NOCTUIDAE 



Subfamily AGROTINAE 



Euxoa clavigera, new species. 



Fore wing rather dark gray, the stigmata and subterminal 

 space light gray filled ; subbasal space tinged with dull luteous 

 centrally; inner line black, double, of three sections, those on 

 costa and internal margin a little further out than the central 



