1886.] NATURAL SCIENCES OF PHILADELPHIA. 17 



ECHMEPTERYX no v. gen. 



Head much as in Psocus, etc., the ocelli more widelj^ separated. 

 Antennffi with the two basal joints short and stout, the others rather 

 slender, each joint attenuated in its middle, swollen somewhat at 

 its apex. Dorsum of mesothorax entire, not divided into lobes, 

 extended into a projection posteriorly. Tarsi three-jointed. 

 Wings covered with scales of various forms. Apex of wings 

 pointed, and furnished somewhat densely with long hair. Neura- 

 tion peculiar, as shown in Plate I, figs. 5-6. 



Belongs to a group with Amphientomum and Perientomum, 

 probably most closely allied to Dr. Hagen's Amph. (Syllysis) can- 

 datum ; differs in the neuration. 



Eohmepteryx agilis. Plate I, figs. 4-9. 



Antennae much shorter than the wings, pale fuscous ; palpi 

 fuscous. Nasus fuscous, pilose ; rest of head somewhat pilose, 

 pale, with dark brown markings, a bent brown line across the 

 head, transversely, separating the anterior from the posterior 

 ocelli; before the ocelli, in the middle, some irregular brown 

 markings and bands (varying in diff'erent specimens), and between 

 the ocelli, connecting with the transverse line, two convergent 

 brown lines, extending to a brown patch on each side upon the 

 occiput ; on each side, within the margin of the eyes, another 

 brown spot, becoming a line, and also joining the occipital patches. 

 Ocelli black, each one within a small brown spot ; eyes brown and 

 golden yellow. Thorax brown, portions pale luteous, dorsum of 

 mesothorax dark brown, somewhat scaled, and very pilose. 

 Abdomen pale yellowish or luteous (in some specimens fuscous, 

 probably discolored by drying), with some brown markings. 

 Legs fuscous, somewhat paler or luteous ; tarsi luteous, fuscous 

 towards base. Wings fuscescent or smoky when denuded, becom- 

 ing hyaline towards the apex ; veins darker, semitransparent. 

 Scales mostly fuscescent, paler towards the base; when upon the 

 wing seemingly fuscous, and when thickly placed appearing almost 

 black ; other scales luteous upon the wing. These scales cause 

 the wing to be covered with black, fuscous and luteous patches. 

 The long apical hair mostly fuscous, luteous in patches. Hind 

 wings hyaline, slightly infuscated, no scales, the long apical hair 

 fuscous. Length to end of wing about 3 millim. 



Pennsylvania. I found this species on the trunks of beech 



