4 NEW CALIFORNIAN APHIDIDAE 



Apterous viviparous female. — There is a considerable variety in the coloring 

 of the apterous females. Some are pale lemon-yellow with pale brown spots 

 on the abdomen and thorax to coiTespond with those of the alates. Some 

 are pale lemon-yellow without dorsal markings, and others with slightly dusky 

 markings here and there at the bases of some of the abdominal hairs. Others 

 are of a pinkish color with the head and thorax pinkish-orange and the abdo- 

 men pinkish, with three small luteous spots caudad to a large median dorsal 

 luteous spot. These three spots are located almost in a transverse line be- 

 tween the cornicles. The cornicles and cauda are pale. The legs are pale 

 with the joints sometimes dusky. The antennae are luteous with the spur 

 and the apices of segments III-VI dusky. The whole body is covered with 

 fairly long capitate hairs, each arising from a more or less distinct tubercle, as 

 is common in this genus. 



Measurements: Body length, 2.18 mm.; width, .90 mm.: antennae total, 1.41 

 mm.; Ill, .39 mm.; IV, .31mm.; V, .24 mm.; VI, base .14 mm.; VI, spur, .16 

 mm. 



Myzocallis maureri new species (Figs. 2, 17, 29, 33, 39.) 



In the summer of 1915, the writer took a few spechnens of a 

 species of Myzocallis from the under side of the leaves of coast 

 Hve oak (Quercus agrifolia), on the campus of the University of 

 Cahfornia in Berkeley. He first found it on June 9, 1915, and 

 then several times -later, throughout June and July. George 

 Shinji, a graduate student in the Universitj'", had already col- 

 lected the same species in March. In April 1916, Essig sent the 

 author a few specimens taken at that time in Berkeley. Only 

 the alate viviparous females and the njanphs have been taken. 

 In June 1916, the writer found it fairly abundant on the under 

 side of the leaves of the California black oak (Quercus kelloggii), 

 in the Cuyamaca Mountains of San Diego County, at an altitude 

 of 3500 to 5000 feet. Here it was found only on the black oak, 

 although in several cases a live oak (Quercus agrifolia) and a 

 black oak were growing side by side, the former free from infesta- 

 tion, the latter more or less heavily infested. This latter obser- 

 vation is interesting, for in Berkeley the live oak was the only 

 observed host plant. Specimens taken in Berkeley were exam- 

 ined by W. M. Davidson, J. J. Davis and E. O. Essig, but none 

 were able to identify it with any species known to them. Con- 

 sequently it is herewith described, being named Myzocallis maur- 

 eri, after the writer's friend and classmate, Mr. L. M. Maurer of 

 Los Angeles, California. Cotype specimens are in the author's 

 collection under the serial number AFS 53-15 and in the collec- 

 tion of the University of California. 



