Pomona Colleok Joihnal ok Kn'tomoi-ociv 



493 



Tliorax arclu'd. Pronotiini tiTiuinnling Inti-rnlly in n distinct knob-like cnlarjfc- 

 nicnt (laliral tulxTcle of pronotuni); proplcuritcs exceedingly short, nearly 

 sqnnre, r.itlier de|)ressed. Dorsuluni vnrinble in Irtif^h, usually shorter than 

 seutuni. /CiM/f* hrondly rounded nt apex, hyaline, maculate, fumatc, or spotted; 

 vein fureatiiui distinctly dichotonious; ptcrostigina wanting. 



Anal valvi- of male with a long acute posterior lohe usually reaching to tip of 

 genital plate, and ofti'u with an inferior e|iiphysis; elaspers liroadly spatulate to 

 snhspatulate at ti]). 



Type of genus: Aphalara calthae I.inm- (1760). 



It has been necessary to reassign the diagnostic lines of this genus because of 

 the- artificiality of the previously .accepted lines. After long and enreful study of 

 large series of species and specimens, it seems beyond question that the character 



.>■"» 



T 





:-' 



Figure 159. Details of Psyllidte 

 A, Carsidar.i concolor; B, C. mcvicana; C. Rhiuopsylla jalapcnsis; D, Epicarsa 

 coriiiciilata: E, Triozoida jolinsonii: F, G. .Xpbalara cnllh.i-: II. .Aph. communis; I. 

 Aph. minutissima; L, Aph. caltha- niaculipennis; M. Aph. artcmisi.t angustipcnnis; 

 N, Aph. pulchclla; O, Aph. picta; P, Aph. ncbulosa; R, .Vph. ncbulosa americana; 

 S, Aph. calthx. 



