136 Psyche [October 



Genitalia: Fourth ventral plate same color as genital segments, 

 without lamellae, almost naked. Accessory plates seem to be 

 linear processes from second segment that extend forward from 

 near base of forceps and then turn inward and downward. An- 

 terior claspers stubby, ends bent forward and slightly expanded; 

 posterior claspers slender, hooked forward at tips, often retracted 

 within second segment and not visible. For structure of penis see 

 Fig. 6. 



Females differ from males in following important characters. 



Head : Breadth of front at its narrowest part about equal to eye 

 width, cheek height two sevenths to one third of eye. Just below 

 ocellar triangle frontal vitta fully twice as wide as each parafrontal, 

 much broader than in male, its sides parallel and distinctly de- 

 lineated to posterior extremity of the triangle. Third antennal 

 segment broader and thicker than in male and prominently marked 

 with sensory organs. Chwtotaxy. Last pair of frontals (stronger 

 than preceding pairs and directed backward and outward) on 

 same transverse line as greater ocellars. 



Wings: Bend of fourth vein slightly acute; costal spine slightly 

 stronger than in male. 



Legs: Ventral row of bristles of posterior face of hind femur 

 confined to proximal half; tarsus fully as long as tibia. "Comb" 

 absent on middle femur; posterior face of tibia with two additional 

 bristles that are near median dorsal ridge, submesotibial bristle 

 present. Chaiotaxy. That of mesonotmii somewhat more re- 

 clinate. 



Abdomen: Oval in outline, clothed throughout with short re- 

 clinate bristles. Chaiotaxy. Marginals of second segment even 

 less conspicuous than in male; laterals of second and third segments 

 extend to ventral plate but are short and decumbent. 



Genital Segments: Not protuberant. Fifth ventral plate 

 wider than fourth and of same color as genital nota. Fifth notum 

 (first genital segment) not divided into lateral lips, narrow, fringed 

 with bristles; spiracles scarcely visible (concealed by fourth notum), 

 well below center. Notum and sternum of second genital segment 

 prominent. 



Described from nine male and two female specimens. 



Type: Massachusetts Agricultural College, Amherst, Mass., male 

 and female. Paratypes: United States National Museum, Wash- 



