32 Psyche [April 



inesopleurse and extending over mesosternum, coxae, trochanters, 

 femora except distal ends of mesofemora and metafemora, more 

 or less suffused with rufous, tibiae except narrow band on caudal 

 margin and a ring at the distal end, protarsi and mesotarsi except 

 narrow band on caudal margin, narrow band on proximal end of 

 basitarsi of metatarsi, ventral aspect of abdomen, and caudal ter- 

 gum except at sides; mesal portion of terga with a yellowish mark, 

 largest on second to fifth, extending along caudal margin; clypeus 

 deeply squarely emargmate; third segment of antennae distinctly 

 longer tban fourth; antennal furrows broadly rounded, indistinct; 

 ocellar area elevated, ocellar basin a rounded furrow ; median fovea 

 indistinct; head punctate below lateral ocelli; oblique depression 

 extending from lateral ocelli toward compound eye; mesonotum 

 polished; wings hyaline, costal and proximal spot on stigma yel- 

 lowish, veins and stigma black; saw-guides convex on dorsal and 

 ventral margins, distal end obliquely rounded. Length 6.5 mm. 



Habitat: Ithaca, New York. No. 171-1. 



This species is similar to apertus Nort., but the difference in the 

 length of the third segment of the antennae will separate them. 



Unitaxonus Gen. 



nov. 



Front wings with the radial and radio-medial cross-veins distinct, 

 free part of subcosta one apparently wanting, free part of second 

 anal vein present, slightly oblique, located some distance nearer the 

 proximal end of the wing than media four plus cubitus one ; hind 

 wings with the free part of radius four and the transverse part of 

 media two wanting, the second anal cell petiolate; antennfe with 

 nine segments; clypeus nearly truncate in the female; the basi- 

 tarsus of each metatarsus about subequal in length to the four fol- 

 lowing segments. Type, Unitaxonus repentinus MacGr. 



Unitaxonus repentinus sp. nov. 



Female. Body black with the following parts rufous ; mandibles, 

 femora, tibise, protarsi, mesotarsi, and abdominal segments two to 

 four, including terga and sterna ; with the following parts whitish : 

 lahrum, tegulas, pTocoxa3, distal portion of mesocoxae, and troch- 

 anters; antennae with third segment distinctly longer than fourth; 

 clypeus faintly broadly emarginate, almost truncate; supraclypeal 



