14 MISCELLANEOUS STUDIES 



This species has been taken only in the vicinity of Stanford Uni- 

 versity, where it infests copper beach (Fagus sylvatica). It may be 

 easily recognized by the masses of whitish flocculence on the under 

 side of the leaves. Each mass contains one individual, which is 

 entirely hidden by it. In looking up the literature of this species 

 the author found that there has been no description of it published in 

 America, so below is included a brief description of specimens taken 

 near Stanford University on April 28 and May 29, 1915. 



Alate viviparous female. Prevailing color dark green, covered 

 .with a whitish flocculence. This flocculence consists of wax threads 

 as much as 3 mm. long. Head dusky, with frontal margin black. 

 Eyes red. Antennae dusky, except II and basal one-third of III, 

 which are pale. Beak pale with apex and joints dusky. Thorax 

 dusky green with lobes black. Abdomen dark green with a row of 

 black spots on each margin and about seven black transverse dorsal 

 bands. Cornicles black. Cauda and anal plate concolorous with 

 abdomen with distal margins slightly darker. First and second femora 

 pale with apices only dusky; third femora dusky throughout. First 

 tibiae pale with apex dusky; second and third dusky throughout. 

 Tarsi black. Wings hyaline, stigma gray. 



Head twice as wide as long, furnished with many small wax 

 glands. Antennae reaching to the cornicles or to the base of the 

 cauda, set on small tubercles (fig. 12). Ill is the longest segment, 

 followed by IV, V, and VI. VI spur is merely a thumb-like projec- 

 tion (fig. 16). The usual primary and accessory sensoria are present 

 on V and VI. Secondary sensoria are found only on III (fig. 9). 

 These are fairly large, almost circular, and placed in a single row 

 along the segment. They number from four to seven, five being the 

 average. The beak is short, reaching but slightly beyond the first 

 coxae. The wings are normal, with a twice-branched third discoidal. 

 The cornicles are merely small pores. The cauda is short and knobbed, 

 the anal plate emarginate or bilobed (fig. 11). 



Measurements : Body length 2.0 to 2.4 mm., width 0.8 to 1.04 mm., 

 antennae total 1.55 to 2.06 mm., Ill 0.591 to 0.77 mm., IV 0.34 to 0.47 

 mm., V 0.27 to 0.39 mm., VI 0.19 to 0.25 mm., cornicles (diameter) 

 0.05 mm. 



Apterous viviparous female. Prevailing color under flocculence 

 pale yellowish green. Light brown markings as follows: two rows 

 of four spots each across the prothorax, one large spot on each margin 

 and one on the dorsum of the thorax, four spots on each abdominal 



