762 Pomona Coi-lege Journ.u^ op Entomology 



5. Article III of antennre dark at tip only, body without dorsal mark- 

 ings, hyalinus 



Article III of antennjt' dark at base and tip, or wholly ilark; body 



with dark dorsal markings on abdomen. arundicolens 



M. ulinifolii (Monell) Wilson. On llhiui.s aiiuricaiius L. Collected in 

 the vicinity of Stanford University, Palo Alto, California, liy Davidson. Jr. 

 Ec. Ent, Vol. LL, 301, 1909, and Vol. Ill, 376, 1910. 



M. qucrcus (Kalt.j. First reported by David.son, who collected it on Blue 

 Oak (Qucrcus kellogii*) and on White Oak (Q. lobata), in the vicinity of 

 Stanford University, Palo Alto, California. Jr. Ec. Ent., II, 302, 1909. Again 

 reported on Jilue Oak (Q. duuglasii) and the White Oak at Palo Alto by David- 

 son and also on Black Oak (Q. californica) near San Jose, California. Jr. Ec. 

 Ent., Ill, 376, 1910. Later taken by the same author on English Oak (Q. 

 robarf) and on the White Oak in Placer County, California. Davidson doubts 

 if this is true M. quercus (Kalt). P. C. Jr. Ent., Ill, 399, 1911. 



M. alni (Fabr.) Passerini. Collected by writer on undersides of leaves of 

 the common Alder (Alnus rhombifolia Nutt.), on some of which it occurs in 

 large numbers. More or less scattering in the vicinity of Santa Paula, Califor- 

 nia. (See description.) 



M. coryli (Goetze) Pass. First reported by Clarke, who collected it on 

 hazelnut (Corylus sp.) Berkeley, California. Can. Ent., XXXV, 249, 1903. 



M. hyalinus (Monell). On Oak (Queixus imbricata). First collected by 

 Clarke at Berkeley, California. Can. Ent., XXXV, 249, 1903. 



M. arundicolens (Clarke). On Bamboo (Arundo sp.) at Berkeley, Cali- 

 fornia. Collected and described by Clarke, Can. Ent., XXXV, 249, 1903. 

 Davidson reports this species from Palo Alto, California, Jr. Ee. Ent., II, 

 301, 1909, and III, 376, 1910. C. W. Beers, Horticultural Commissioner of 

 Santa Barbara County, collected this species at Santa Barbara, where it was 

 badly infesting bamboo hedges. 



M. alnifoliae (Fitch). In The Host Index to California Plant Lice 

 (Aphididae), published in the Pomona College Journal of Entomology, this 

 was listed as Callipterus alnifoliae (Fitch) under Alder (Alnus rhombifolia 

 Nutt.). It is wrongly listed, as the species has never been reported in this 

 state, and should have been Lachnns alnifoliae (Fitch), which wa.s omitted in 

 its place. 



EUCALLIPTERUS Schouteden, 1906 

 Tyi^e Aphis tiliae Linnaeus 



Body — Tapering; front of head wide with a tubercle on each side of the 

 frontal ocellus, each of the tubercles bearing a single slender spine or bristle. 



Antennae — Not on prominent tubercles, slightly longer than the body, 

 slender, tapering towards the tip; first segment straight on the inner side, spur 

 of article VI not longer than the base. 



*Quercus douglasii H. & A.? 



