196 THE APPr.E LEAF HOPPKK 



of abdomen smooth. ( )vipositor as long as tlie abdomen. Legs yellow, 

 the apical tarsal joint dark; posterior tibiae snb-clavate. Wings hyaline, 

 the veins piceous; stigma narrow, but of quite perceptible width. First 

 discoidal cell and tirst submarginal confluent; first section of the radius 

 one-half as long as the first transverse cubitus, and one-fourth as long as 

 the second section of the radius; second transverse cubitus one-half as 

 long as the first; second discoidal cell wanting. 



i\lAL£. This sex differs in ha\ing 23-jointed antennae; otherwise notice- 

 able dififerences are wanting. 



This i.s the .seventh species to lie disci tvered in Xorth America. 

 It conies closest to A. niiisctv Ashmead, from which it (hffers in tlie 

 nttmber of antennal joints of the male, and the length of the basal 

 flagellar joints in both sexes. Our species may be distinguished by 

 the following dichotomy : 



NORTH AMERICAN SPECIES OF APH^RETA. 



1. Legs, first alnlominal segment, and base of antemue 



white I'd! Hi pes Say. 



Legs, first abdominal segment and base of antennae yel- 

 low or brownish 2 



2. Tip of antennae white, first four joints of antenn:e yellow, .aficalis Ashmead. 

 Tip of antennas black, only the first two joints yellow 3 



3. Vertex with a longitudinal grooved line extending from the 



occiput to tiie ocelli 4 



Vertex without such a groove, or with only the trace of one 



anteriorly 5 



4. Female antenna? 21-jointed. . . . ■ ... .aW/yorH/ca Ashmead. 

 Female antenucC 23-jointed oscinidis Ashmc-dd. 



5. Metathorax with a strong transverse ridge, its posterior 



face striate auripcs Prov. 



Metathorax of a different conform;ition 6 



6. Second section of the radius twice as long as the first trans- 



verse cubitus ' 



Second section of the radius shorter, as long as the first trans- 

 verse cubitus and the first section of the radius to- 

 oether siihfricariiiata Viereck. 



7. Antenuc-E with the second flagellar joint almost twice as long 



as the first : male antennae 23-jointe(l pci^oniyiac Brues. 



Second flagellar joint not more than one-third longer than 



\ iiiusoc Ashmead. 

 tlie first \ ciclosa Viereck. 



