762 Pomona College Journ.vl op Entomology 



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

 ings, hyaliiius 

 Article III of autenme dark at base and tip. or wholly dark; liody 



with dark dorsal niarkin^js on abdomen. aruiidicoleiis 



M. ubnifolii (^lonell) Wilson. On Uhnus (iiiici-icanus L. Collected in 

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

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



M. qucrcus (Kalt.). First reported by Davidson, who collected it on Blue 

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

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

 reported on Blue Oak (Q. douglasU) 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. qucrcus (Kalt). P. C. Jr. Ent., Ill, 399, 1911. 



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

 the common Alder (Alnus rlioinbifolia Nutt.), on some of which it occui*s in 

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

 nia. (See description.) 



.¥. 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 (Qucrcus 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. Ec. 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 sliould have been Lachmis alnifoliae (Pitch), which wa.s omitted in 

 its place. 



EUCALLIPTERUS .Scliuutcden, l'X)6 

 I y])e Aphis tiliae Liniiacns 



BchUj — Tapering; front of iieail wide witli a tul)erele on each side of the 

 frontal ocellus, each of the tubercles l)caring a single slender spine or bristle. 



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

 slender, tapering towards the tij); first segment straigiit on the inner side, spur 

 of article VI not longer tluiii the ba.se. 



*Quercus douglasii 11. & A..' 



