78 MISCELLANEOUS STUDIES 



this is not Amphorophora instead of Nectar osiphon. There is con- 

 siderable difference in the antennal tubercles of this species and 

 species of Amphorophora, although otherwise they are quite similar. 

 The author believes that slight as the difference is it should be recog- 

 nized for it is through the shape and size of the antennal tubercles 

 that the different genera of the Macrosiphini are recognized in a 

 large part. In this species the tubercles are large and distinct and 

 neither gibbous nor toothed on the inner side, and with the outer side 

 quite evident, while in Amphorophora they are small and distinctly 

 toothed on the inner side, with the outer side a mere line, or not at 

 all evident. 



96. Nectarosiphon morrisoni Swain 



Figures 124 to 127 

 Swain, Trans. Am. Ent. Soc., vol. 44, p. 8, 1918. 



Records. Cupressus macrocarpa; San Francisco (Compere, Morrison), San 

 Diego (Swain) : C. guadalupensis; San Diego (Swain). 



In Golden Gate Park, San Francisco, and in Exposition Park, San 

 Diego, this species has been taken on cypress. The small, slender, 

 long-legged apterae are found infesting the terminal leaves of the 

 host. Occasionally an alate female is seen. In San Diego, the apterae 

 were found in company with Cerosipha cupressi Swain. 



26. Genus Pentalonia Coquerel 



Coquerel, Ann. Ent. Soe. France, vol. 7, p. 239, 1860. Type P. nigro- 

 nervosa n.sp. 



97. Pentalonia nigronervosa Coquerel 



Coquerel, Ann. Ent. Soe. France, vol. 7, p. 239, 1860 (orig. desc.). 

 Wilson, Jour. Econ. Ent., vol. 2, p. 346, 1909 (desc.). 



Record. Pelargonium sp. ; Stanford University (Morrison). 



The following note concerning this species is from Morrison: 

 Pentalonia nigronervosa Coquerel. See Wilson, Jour. Econ. Ent., 1909. In 

 the Davidson collection (belonging to Stanford University) there is a single 

 glycerine jelly mount of this species. I have been able to see enough of it to be 

 certain of its identity with that described by Wilson in the Journal (above). The 

 record is from geranium, and Davidson once told me that he found it in alcohol 

 in the laboratory [of Stanford University] at the time he began his study of the 

 Aphididae. I believe the record should be published. 



