Pomona foLLKch: Journal uf Exto.\ioiak!\ 77;i 



LACHNUS nurmeister 



Syn. Lachniella Del (iuerciu 



Type L. fasciatus liunn 



LACHNUS I'.urm. 

 Key to California Species 



1. Body very dark green or hrowii, or lilackisli. 2 

 J?0(ly dull green or light green. 4 



2. Body secireting rather long tiocculenec. occidentaiis 

 Hody only purvelent. 3 



'S. Body bliiekish clouded witii lirown. abietis 



Body light amber brown. juitipcri 



4. Body with little or no purvelenee, light green. alnifoliae 



Body with rather thick purvelenee, dull green with reddish spots on 



dorsum. pini-radiatnr. 



L. occidentaiis Davidson. In large colonies on the underside of young 

 shoots of Abies grandis Lindl. Jr. Ec. Ent., II, 300, 1909. Taken in the vicin- 

 ity of Stanford University, Palo Alto, California. Winged form not described. 



L. abietis Fitch. Reported by Davidson on Abies conculor Parry (White 

 Pine), where it collects in large colonies on the liiul)s. At Palo Alto, Califor- 

 nia. Jr. Ec. Ent., II., p. 290, 1909. 



L. juiiiperi De Geer. Taken by writer on Tliiiya uvcidi iiUilis. where it 

 gathers in quite large colonies on the stems. Claremont and Santa Paula, 

 California. P. C. Jr. Ent., Ill, pp. 541-543, 1911. 



L. alnifoliae Fitch. Rei)orted on Alnus sp. (Alder) by Clarke, at Berke- 

 ley and Colfax, California. Can. Ent., XXXV, p. 248, 1909. Also reported on 

 Alder by Davidson at Palo Alto, California. Jr. Ec. Ent., II, p. 300, 1909. 



L. pini-radiatae Davidson. Found on needles of Jlonterey Pine (Pinus 

 radiata Gord.), both in the green house and outside. Palo Alto, California. 

 Jr. Ec. Ent., II, pp. 299-300, 1909. 



Pterochlorus Rondani 

 Syn. Cinara Curtis 

 Dryobius Koch 

 Dryaphis Kirk 

 Type Aphis roboris Linn. 

 No species of this genus yet taken in this State. 



ESSIGELLA Del (".uercio 

 Type Lachnus californicus Essig 



E. californicus (Essig) Del Guereio.- Taken by the writer on Cultivated 

 Monterey Pine {Pinus railiala Gord.) on Pomona College Campus, Claremont; 

 California, and at Santa Paula, Calif(.rnia. P. C. Jr. Ent.. 1. ]). 4. 1!)()0. (See 

 same in this paper.) 



