302 University of California PuUioations [Entomology 



INTRODUCTION 



California offers a specially inviting field for the study of 

 the Apliididae not only because of the comparatively large num- 

 ber of new species yet undescribed, but also because of the great 

 and varied adaptations constantly going on to the everchanging 

 vegetation at the hand of man. The campus of the University 

 of California with its many native plants growing under per- 

 fectly natural conditions and the hundreds of introduced species, 

 together with numerous parks such as Golden Gate Park. San 

 Francisco, furnish large and excellent fields for study and in- 

 vestigation. In such environment there are not only many new 

 species of insects to be had, but there are the constant changes 

 of food plants and distribution of old and well known species. 

 The material at hand was taken under such conditions and rep- 

 resents but a small part of a season's work. Unless otherwise 

 specified the data was taken in the field by the writer. 



DESCRIPTION OF NEW SPECIES 

 Myzocallis arundinariae, n. sp. 



1. Davidson, W. M., Jour. Econ. Ent., vol. 2, p. 301, 1909, CalJip- 



terus arundieolens (Clarke). 



2. Essig, E. O., Pom. Coll. Jour. Ent., vol. 4, no. 3, p. 762, 1912, 



Myzocallis arundieolens (Clarke). 



3. Essig, E. O., Inj. & Ben. Ins. Cal., ed. 1, p. 83, 1913, fig. 65, 



Myzocallis arundieolens (Clarke). 



4. Davidson, W. M., Jour. Econ. Ent., vol. 7, pp. 129-130, 1914, 



fig. 2, Eucallipterus arundieolens (Clarke). 



5. Essig, E. O., Inj. & Ben. Ins. Cal., ed. 2, p. 84, 1915, fig. 67, 



Myzocallis arundieolens (Clarke). 



During the year 1911 the writer received from ]\Ir. C. W. 

 Beers, Horticultural Commissioner of Santa Barbara County, a 

 few leaves of bamboo taken at Carpinteria, California, and in- 

 fested with a yellow and black plant louse which agreed so well 

 with the description of Callipterus arundieolens (Clarke)- that 

 it was unquestionably listed as that species. The same insect was 

 taken and received by the writer from a number of localities 

 throughout the state since that time, but it was not until the past 

 year, when a close study of the species described by Professor 



Can. Ent., vol. 35, p. 249, 1903. 



