144 [February 



is not interrupted. 



Tlie absence of middle under wing cells is not uncommon in certain 

 species in this country. In these the males only are sometimes deficient 

 and sometimes have only one wing perfect. These variations seem to 

 occur in but few species, and never in the majority of others. 



ETJTJRA Newman. 



E. orbitalis, n. sp. Length 0.16. Ex. wings 0..32 inch. 

 9 % . Shining black. Apical half of antenna pale beneath, third joint hardly 

 longer than fourth; head pale luteus, a large black spot on vertex: clypeus wide, 

 retracted; mandibles at tip black, palpi irregularly black; tegulse, edge of collar, 

 a spot on first segment of abdomen and the legs, pale luteus; posterior tibise at 

 tip and tarsi above, blackish; wings hyaline: stigma large, pale at base. 

 Inhabits Conn., and Brooklyn, N. Y. (Mr. Akhurst.) 

 Four specimens, two of which were taken on the willow. 



LYDA Fab. 

 Anterior tibia witJiout side spier. Fourth joint of antennae hardly longer than fflh. 



L. semicinctus, n. sp. Length 0.34. Ex. wings 0.74. inch. 

 9 . Color black, with white spots. Antennse white; apical half of two basal joints 

 blackish; orbits and back of head white, except at summit; two dots back of ocel- 

 li and one beneath, two interrupted lines from orbits to ocelli, nasus and tip of 

 labrum white; tegulse, edge of collar, V-spot, scutellum and behind, edge of three 

 apical segments, edges of tergum and legs white; middle of femora and tips of 

 tibise and tarsi black; wings faintly clouded, a smoky spot on upper pair below 

 lanceolate cell. 



One specimen from Virginia. (Coll. Phil. Ent. Soc.) 



XYELA Dalman. 



X. tricolor, n. sp. Length 0.30. Ex. wings 0.72 inch. 

 %. Steel-blue, red and black. Antennse black; body steel-blue; spots at insertion 

 of antenna, nasus, labrum, mandibles, palpi and edges of ventral segments white: 

 nasus edged with black, emarginate; mandibles tridentate, inner edge rufous; legs 

 rufous, tips of posterior femora, the tibise and tarsi black; intermediate tibise with 

 five, posterior with six spurs; wings hyaline, stigma black, nervures as in infus- 

 cata, except the costal space, which is widened and divided by a slender longitud- 

 inal nerve, opening into a Y near the stigma. 



One specimen from Kansas. (Coll. Phil. Ent. Soc.) 



XIPHYDRIA Latr. 

 X. attenuatus, n. sji. Length 0.26. Ex. wings 0.38 incli. 

 % . Color pale honey-yellow, body very slender. Head smooth, face rough below 

 ocelli; antennas slender, black, the two basal joints white; a spot inclosing ocelli, 

 tips of mandibles and front angles of mesothorax black: on each side of prolong- 

 ed neck, a blackish line; pectus and legs paler than body; wings hyaline, stigma 

 pale. 



One specimen ; Pennsylvania. (Coll. Phil. Ent. Soc.) 



