770 Pomona College Journ-u. op Entomology 



one-third the distanci' tram its base to apex, obsolete at base, straight, light 

 amber ; second diseoidal arising from the bend of the subcostal, bends inwardly, 

 light amber in color. Style — (Figure I) globular, yellow, covered with long 

 stout hairs. Anal plate — (Figure C) bifid and bearing stout hairs. 



The body of the adult winged female is free from stout hairs or spines. 



NYMPH OF WINGKD VIVIPAROUS FEMALE (Figlire M4, B) 



As large as the adult female before the last moult. Prevailing color — Yel- 

 low covered with dark or dusky capitate glandular hairs which are situated 

 on body tubercles arranged in longitudinal rows — two rows of large tubercles, 

 each tubercle bearing two hairs, and two lateral rows of tubercles, each tubercle 

 bearing one hair. Head — (Figure E) covered with tubercles bearing the capi- 

 tate hairs, yellow. Antennae — (Figure F) nearly as long or as long as the 

 body. Articles I and II color of the head, each bearing a capitate hair, III, 

 IV, V yellow with apical tips dark, VI with portion on each side of process 

 dark, tip and base yellow. Rostrum — Same as in adult form. Legs — All 

 transparently light yellow except the tarsi, which are amber or dusky (some- 

 times black). 



Host — Commonly found feeding upon the undersides of the older leaves of 

 the Southern California Wild Walnut (Juglans califuniica Wats.) but it 

 sometimes occurs on the leaves of the tender shoots, infesting all parts of such 

 foliage. The insects, like most of the members of this genus, produce great 

 quantities of honey-dew upon which grows the black smut which gives the in- 

 fested trees a very unsightly appearance. 



Locality — At and in the vicinity of Sulphur Mountain Springs, about six 

 miles north of Santa Paula, at an altitude of from 1000 to 1500 feet. 



Date of Collection — July 1, 1911. Serial number 41. 



This species resembles most Monellia caryae (Monell) Oestl., but varies 

 in the following: 



Monellia caryae Monell Monellia californicus n. sp. 



Prothorax 



Yellow (Thomas). Yellow with two longitudinal black 



bands on dorsum. 



Antennae 



Yellow with tips of the articles Articles I and II partly yellow, 

 black. (Thomas.) while all of the remaining articles are 



black throughout. 



Shorter than the body. (Thomas.) Longer than the body. 



Article VII (spur of VI) equal to Spur of article VI much shorter 



or one-third longer than the VI. than the base. 

 (Some say shorter.) (Thomas.) 



