AMERICAN NEUROPTERA. 39 



black median band, broadest on the occiput, comes forward to and incloses the 

 ocelli in a round black spot; indistinct pale gray markings above the eyes. Eyes 

 black. Lobes of the thorax shining black, sutures pale. Sides with the sutures 

 sometimes brown. Legs very pale; femora semi-transparent; tibiae pilose, at the 

 base of each hair a minute black point; tarsi fuscous, claws black. Abdomen 

 yellow above, beneath gray, the sutures, which show only at the sides and beneath, 

 black; above a median broken line, two large spots at base and two smaller ones 

 toward apex, black; (these spots sometimes form into lateral longitudinal broken 

 lines, one on each side.) A broad swollen ring around abdomen before apex, 

 sliining black; apical piece yellow; appendages pale at the tips, hairy. Wings 

 liyaline, with iridescent reflections, grayer in the pterostigma, which is rounded 

 below. Veins brown ; a small black spot at the base of pterostigma, and another, 

 l)rown and sometimes absent, at the junction of the cubitus and inner margin. 

 Length to end of wings about 4 millim. 



From fifteen examples, taken with the larva on tree trunks, mostly oak 

 and maple. It is solitary and inert, always in the deepest crevices of the 

 bark. 'J'he immature forms resembles the imago. Sometimes there are 

 no gray lines on the nasus, and the markings on abdomen are often 

 irregular. Monstrosities occur with this species also, for one specimen 

 has, in the left wing, the first apical nervule below the pterostigma, 

 wanting for half its length at the base, and joined to the pterostigma by 

 a transverse nervule, Another has the third posterior nervule forked at 

 its base, in the left wing ; and still another has the first and second apical 

 iiervules joined together with a transverse nervule, near their furcation 

 in the right wing only. 



Psocus inornatus n. sp. — Shining fuscous, or piceous; no lighter mark- 

 ings on body. Antennae shorter than wings, pilose, the apical joints luteous. 

 Palpi fuscous. Legs luteous, tlie femora semi-transparent, fuscous at knees; tibiae 

 jiilose, a black point at tlie base of each hair; tarsi pale. Thorax black, the lobes 

 shining, reflecting a slight reddish transparency. Abdomen blackish brown, 

 shining. Wings exactly as in the preceding species, except the veins which are 

 ])aler brown. Size and general contour as in the preceding. 



From one specimen, taken among the foliage of white oak. 



P^ioeus se.icpiiiictatus Linue. 



Ihe addition of this species to our North Anerican Fauna, I believe 

 is now for the first time recorded. I procured two s{)ecimens agreeing 

 thoroughly with M'Lachlin's description, (Ent. Mo. Mag. Vol. 8, 241.) 

 and I believe it is an indigenous species, having found it on a white oak 

 trunk, in remote woods, several miles from Philadelphia. 



PSOCUS atratllS n. sp. Plate IX, fig. C^. — Black: shining on nasus. Man- 

 dibles jiartly dull yellow. Antennae sliorter than wings, pilose, the hairs fuscous. 

 Palpi with fine short wliite iiairs and a few of tlie same on nasus. Eyes black. 

 Lobes of thorax dull l)lack; suture a little paler. Legs black, pilose; tiie femora 

 ))artly fuscous. Alidoinen with no ligliter markings. Anterior wings fuscous, 



