46 [May 



Head yellow, palpi yellowish, brownish towards the tip: front above the an- 

 tennae yellow: a black, triangular spot occupies the remainder of the front and 

 the vertex. Thorax more or less tinged with bright lemon-yellow on the ante- 

 rior part of the prothorax above and on the pleurae: intermediate stripe brown- 

 isli-bhick, triangular: lateral stripes brownish, very much abbreviated anteri- 

 orly. Ilalteres yellowish-ferruginous with a more or less distinct trace of 

 leinon-yellow on the knob. Feet ferruginous: coxse more or less tinged with 

 lemon-yellow ; anterior half of the femora somewhat paler than the posterior 

 one (especially in the male). Tarsi dark tawny, two last joints blackish : in 

 the female, the basal joints of the tarsi are lighter ferruginous. Abdomen 

 brownish-ferruginous, with a more or less distinct, narrow, black dorsal stripe. 

 generally interrupted at the incisures of the segments; posterior corners of the 

 intermediate segments, on the back, as well as on the venter, more or less 

 tinged with lemon-yellow. Wings subhyaline, a yellowish tinge along the 

 anterior margin, which reaches as far as the stigma; a similar tinge along the 

 fifth longitudinal vein; stigu^a yolk yellow; a large brown cloud behind it, 

 which on one side has a definite limit, formed by the cross-veins between the 

 stigma and the discal cell ; on the other side (towards the apex) there is no 

 such limit, and the brown fades away gradually; this cloud does not touch the 

 costal margin, so that there is a small hyaline space left between it and the 

 stigma; posteriorly, the cloud covers the apical half of the discal cell and does 

 not reach beyond the hind margin of this cell. 



Male. Antennae rather long (reaching somewhat beyond the root of the 

 wing), with four rows of branches ; the inner ones about half so long as the outer 

 ones; the three basal (branchless) joints and the flagellum. except its extreme 

 tip. are yellowish : the branches are brownish. The male genitals are clavate. 

 but the club is smaller than that of the species of the following section ; their 

 color is brownish-ferruginous, blackish above. 



Female. Antennae hardly reaching the root of the wings, serrated, ferrugi- 

 nous-yellowish ; upper valves of the ovipositor very short and, beyond their 

 broad basal portion, abruptly narrowed and almost linear: their tip is rounded. 

 Hab. Illinois (Mr. Walsh.) 



Observation. — I have seen in Dr. Harris's Collection in Boston, two 

 female specimens of a Ctenophora, which, judging by the structure of 

 their antennge. seem to beldng to this .section. I reproduce here the 

 short description made by me, at the time when I saw them. 



C. apicata n. sp. 9 • 



Whole body yellowish-brown, shining; some darker spots on the vertex and 

 thorax ; abdomen also darker, with the hind margin of one or two intermediate 

 segments yellowish. Antennae yellowish, rather short, subpectinated or sub- 

 moniliform. Feet brownisli-yellow, apical third of the middle and of the hind 

 femora brown; tarsi infuscated towards the tip. Wings yellowish; apical 

 ])art, posterior to the discal cell, tinged with brown. 



Hab. Maine; New Hampshire. 



