6 [April 



the wings have the fuscous ;<pot below the stigma round, with some- 

 times a fainter lengthened spot beneath, and their base more or less 

 smoky. 



The male is undescribed. Its antenn;« are longer and are only tipped 

 with yellowish. Its legs are black, with the anterior tibia3 pale before. 

 The wings are clearer and the fuscous spot less distinct. 



Massachusetts. ($1. SI.) 



(i. Hylotoma scapularis, Klug. 

 //. cdlcanea. Say. 

 (Jrdinarily, the male and female are alike, having the head, breast, 

 metathoras and abdomen blue-black ; the pro- and mesothorax, scutel 

 and pleura rufous, the legs blue-black, tibia) and tarsi more or less 

 whitish beneath ; wings violaceous. 



Var. a. % ■ Only the prothorax rufjus; the mesothorax, scutel and 

 pleura the color of body ; legs below the knees almost entirely white : 

 apical third of wings hyaline. 



Pennsylvania. (Coll. Eut. Soc. Philad.j 



A pair was taken in coita^ of which the female resembles the usual 

 ty|)e, and the male varies as above. 



C4enus ATOMACERA. 

 7. Atomacera ruficoUis. n. sp. 



Black, the pro- and mesothorax and scutel rufous. (Long 0.17. Br. wings 

 0.40 in.) 



9. Shining black, short and stout; antenn;© thickly ciliate, 3rd joint not 

 clavate but decreasing in size from before the middle, very slender at tij) ; the 

 4tli and otli joints of palpi flattened and enlarged, apical joint of equal length. 

 but slender: basal third of antennas and face lieueath ferruginous, hairy: teg- 

 ul8e. anterior angle, mesothorax and scutel rufous : legs black, their anterior 

 tibite dull whitish, tibial spurs very short and sharp; wings ample, blackish 

 fuscotis, clearer toward the ajDex, nervtires blackish, stigma large : four sub- 

 marginal cells, the 1st small, its cross nervine clear and indistinct, 2nd cell of 

 equal width throughout, 3rd wider at apex than long: lanceolate cell short, 

 petiolate : uuderwings with two middle cells. 



Pennsylvania. (Coll. Ent. Soc. Philad.) One female. 



Not having seen either of Say's species, I cannot feel sure that it 

 belongs to this genus. The form of the 3rd submarginal cell is (juite 

 different. The abdomen is pointed like that of JVemafus, while that of 

 Srhizorrruti is like Hi/lotoma. 



