March, I9i6.] DaVIS : CiCADAS FROM THE UNITED STATES. 57 



types. His published description is very full and among other things 

 he says that the first three apical areoles of the fore wings " includ- 

 ing the veins and cross veins smoke-brown." This is subject to 

 some variation, though the first and second cross veins are always 

 clouded in mature specimens. He says : " Opercula short, pale, but 

 little more than one-third the length of the abdomen, narrowing 

 toward the tip, and rounded there ; the tips widely separated by a 

 wedge-shaped space ; the drums completely covered by an inflated 

 segent, with a wide interval between, which is occupied at the outer 

 end by a smooth hump. The raised smooth line thus begun is con- 

 tinued back upon the succeeding tergal segments, and from each 

 prominence a grooved line extends outwards to the border of the 

 segments." 



Cicada olympusa Walker was described in 1850, but no locality 

 was given. It has been credited to North America by Distant. The 

 description would seem to cover Cicada sordidata which is of the 

 same size and we have been unable to find any other species in col- 

 lections that fits it so well. Walker says in part : " scutcheon of the 

 fore-chest [prothorax] adorned with four black stripes; the middle 

 pair long, widened on the fore border and on the hind border ; the 

 outer pair short and slightly curved; furrows and sides blackish; 

 hind scutcheon [hind margin or collar] green, widened, rounded and 

 adorned with a large pitchy mark at the base of each fore-wing, 

 nearly straight on each side : scutcheon of the middle chest [meso- 

 notum] adorned with four obconical black stripes; iimer pair short 

 with tawny borders; outer pair much longer, excavated into eight 

 separate parts ; a large black spot with a black dot on each side be- 

 tween the inner pair and the cross-ridge . . . fore borders of the 

 [abdominal] segments adorned with pitchy interrupted bands; over- 

 duct ferruginous : drums pale tawny, very small, far apart ; inner 

 sides pitchy." 



H it is meant that the extremities of the opercula are far apart 

 then the above description agrees with sordidata, in which, however, 

 the upper and inner edges of the opercula touch or nearly so. 



Cicada milvus was described by Walker in 1858 from a single 

 female from the " United States " and has been placed by Distant 

 as a synonym of Cicada olympusa. Walker describes milvus as red- 

 dish tawny and says in part : " Prothorax with four black stripes, the 



