20 NEW CALIFORNIAN APHIDIDAE 



Cauda, and atrophied cornicles. Again in August 1916, the 

 author took a number of specimens of the species from Cupressus 

 guadehipensis and C. macrocarpa (Montere}^ cypress) in San 

 Diego. A few alate females were reared in the laboratory. On 

 the Monterey cypress this species was accompanied by speci- 

 mens of Nectarosiphon morrisoni new species (see above). In 

 January 1917, it was again observed on bkie cypress, this time in 

 White Park, Riverside. The writer kept this infestation under 

 observation for several months. It was noted that the apterae 

 were found singlj' at the base of the terminal leaves. The alates 

 were very scarce and were obtained only bj'- placing infested 

 branches in closed receptacles. This leads to the view that they 

 undoubtedly migrate to some other host. A large percentage, 

 probably as high as forty per cent, of the apterae were parasitized 

 by a small Braconid}'^ fly. Other species of Cupressus have been 

 carefully examined by the writer, but, with the exception of these 

 two, he has not found anj^ infested with this little aphid, nor 

 has he ever seen any aphid similar to it on another kind of plant. 



FIRENZE — Serie Prima — No. 2, page 116. This reference and description 

 was obtained through the kindness of H. F. Wilson of the University of 

 Wisconsin. 



"Gen. XXV. CEROSIPHA, Del Guercio. 



"Antennae breves quinquearticulate, articuli quinti processus terminaUs 

 setaceus tertium subequans. Nectaria cyUndrica. 



"SYNOPSIS SPECIERUM. 

 "Species unica. 1. Cerosipha Passeriniana. 



"REVISIO SPECIERUM. 

 "1. Cerosipha Passeriniana, Del. G. 



"La specie prende nome de quello del Sig. Conte Prof. H. Passerini, di Fir- 

 enze, che me I'ha gentilmente communicata. Si trova con le femmine attere 

 nella pagina inferiore delle foghe della Salvia splendens, di primavera, Perugia, 

 Maggio 1899." 



The wTiter is unacquainted with the type species, as well as with the one 

 previously known American species of this genus, Cerosipha rnbifolii Thomas, 

 but beUeves that the species here in question fits this genus nearer than it does 

 Sipha, particularly in the relative lengths of the third antennal segment and 

 the spur of the sixth. This species is very odd, however, and could well be 

 placed in a separate genus. 



i-This was determined by A. B. Gahan to be an undescribed species of 

 Trioxys. 



