Vol.1] 



Essig. — ApJiididae of California 



303 



Clarke was made in the type locality at Berkeley, that it was 

 discovered that the former insect had some marked and constant 

 characters not common to the latter and that the differences were 

 sulificient to separate the two. The former has therefore been 

 described as a new species, MyzocaUis arundinariae from the 

 generic name of the bamboo most commonly infested. Only the 

 winged viviparous females — virgogeniae — could be secured, 

 though the writer made a special trip to Sacramento where he 

 had previously taken the species, and enlisted aid from all pos- 



ii r"nftii' i i"' i '"'' . \ " jrr;n T^ Q 



Fig. 1. MyzocaUis arindinariae, n. sp. Winged viviparous female. A, 

 adult; B, lateral aspect of head showing protuberance; C, cornicle; D, 

 Cauda and anal plate; E, lateral view of the dorsum of the abdomen 

 showing dark tubercles and cauda; F, and G, antenna. (Original.) 



sible sources in the attempt. The apparent absence of sexuales 

 is also in contrast to MyzocaUis arundicolens (Clarke) which had 

 an abundance at this time. 



WINGED YIVIPAEOUS FEMALE— VIRGOGENIA 

 The color varies from wliitish to pale yellow with noticeable 

 black markings and bright red compound eyes. The average 

 length is 1.4 mm. and the width near the base of the abdomen 

 0.4 mm. The head is often slightly dusky and ha,s two lateral 

 and a dorsal longitudinal black vittae. The antennae (fig. 1, 



