jujy 3 , 1916 California Green Lacewing Fly 517 



Grape leafliopper (Typhlocyba comes Say). 



The pear Psylla (Psylla pyricola Foerster). 



Mealy plum plant louse (Hyalopterus arundinis Fabricius). 



Melon aphis (Aphis gossypii Glover). 



Black peach aphis (Aphis persicce-niger Ervvin Smith). 



Green Citrus plant louse (Macro si phum. citrifolii Ashmead). 



Citrus mealy bug (Pseicdococcus citri Risso). 



Frosted scale (Eulecanium pruinosum Coquillett). 



Red scale (Chrysomphalns aurantii Maskell). 



Purple scale (Lepidosaphes beckii Newman). 



Mr. E. G. Smyth, working at Tempe, Ariz., found larvae of C. cali- 

 fornica feeding also on the wheat thrips (Euthrips tritici Fitch), which 

 they apparently preferred to the pea aphis (Macrosiphum pisi Kalten- 

 bach). Mr. R. N. Wilson, also at the Tempe laboratory, observed 

 larvae of C. californica feeding upon the barley mite (Notophallus viridis 

 Banks) and on the " green bug" (Toxoptera graminum Rondani) , w T hile the 

 writer reared the species exclusively on the corn leaf aphis (Aphis maidis 

 Fitch), it being a very important check upon this pest. 



LIFE HISTORY AND HABITS OF THE LACEWING FLY 

 THE ADUI/T 



As before stated, this species of Chrysopa was first described by 

 Coquillett (3) in 1890, and later (in 1903) redescribed by Banks (1). The 

 original description of the adult by Coquillett is as follows: 



Pale green, a yellowish white dorsal stripe extends from front of thorax to tip of 

 abdomen; front of head whitish; an irregular wine-red stripe extends from each eye 

 to the mouth, and on its hind border, next the eye, is a black streak; front corners of 

 thorax marked with black. Antennae pale yellowish, minutely ringed with white. 

 Wings greenish hyaline, obtusely pointed at their tips; veins and veinlets wholly 

 green; seven or eight of the veinlets along the hind edge of front wings before the 

 tips are forked; stigma somewhat opaque, yellowish green; legs green, tarsi whitish, 

 the tips brown. Eyes greenish golden, becoming glaucous brown after death. In 

 dried specimens the green coloring becomes more yellowish and the tarsi assumes a 

 slightly darker color than the tibiae. Length 9 to 10 mm. (about }i of an inch); 

 expands from 24 to 28 mm. (about one inch or slightly over). 



The adults are delicate green, flitting creatures which dart up from 

 the shady protecting vegetation as one walks along a fence row or through 

 an alfalfa field. The males are slightly smaller than the females and 

 appear more vivid in color. During the breeding season both are short- 

 lived. Neither sex has ever been noted by the writer to feed in the 

 adult stage, even when food was offered, and doubtless all of the lace- 

 wing flies take little or no food in this period of their existence. 



Copulation takes place almost immediately after the adults have 

 issued and become dry, and in all cases under observation the male was 

 dead on the following day. Oviposition usually begins the day follow- 

 ing copulation and may continue for a period of three or four days, or 

 the full complement of eggs may be deposited in a single day. Four 



