74 THE CANADIAN ENTOMOLOGIST. 



2. "Siphonophora pisi (?)," from G. B. Buckton. 



3. ( Nectarophora destructor, Johns.) 



4. JV. pisi, var. reticulata. 



5. N. pisi, var. from Iowa : 



A, apterous viviparous female ; W, winged viviparous female ; 

 M, male ; a, antenna ; ca, cauda ; cl. cornicle ; wg, wing ; sp, 

 spring. 

 (From camera lucida drawings by the author.) 

 Plate III. 



8. "Siphonophora lactuccp., Walk.," from G. B. Buckton. 



9. Rhopalosiphum /actucce, Kalt. 

 10. Myzus Pergandii, n. sp. 



(From camera lucida drawings by the author.) 



CICADID^E — AMERICAN GENERA AND SPECIES. 



BY ALEX. D. MACGILLIVRAY, ITHACA, N. Y. 



The following bibliographical catalogue was prepared several years 

 ago, and thinking that other workers might find it of use, it is offered for 

 publication at this time. A table of the genera, compiled from the 

 writings of various systematists who have dealt with this family, is added 

 to make the paper more complete. 



Table of Genera. 



A. Lateral margins of the pronotum not angulately dilated. 



b. Basal abdominal segment of the male not expanded or dilated 

 above so as to conceal the timbal or drum ; the operculum 

 usually rudimentary or wanting. 

 c. The ulnar* veins coalesced at base ; tegmina with eight 



apical cells Melampsalta, Kol. 



cc. The ulnar veins not coalesced at base. 



d. The first apical cell of the tegmina distinctly longer than 



the second Tibicen, Latr. 



dd. The first and second apical cells of tegmina equal. 



e. Costal margin of the tegmina very convex; second 

 ulnar cell large and triangular ; the posterior wings 

 with six apical cells Platypedia, Uhl. 



'See Stal, Hemip. Afr., IV., p. 264, for terminology of wing veins. 



