760 Pomona Collece Journal of Entomology 



DREPANAPHIS Del Guercio, 190^ 



Syn. Phymatosiphum Davis 

 Type Drepanosiphum acerifoliae Thos. 



Antennae — Twice as long as the body; situated on distinct frontal tuber- 

 cles; very slender and tapering; article III shorter than the spur of VI, which 

 is at least eight times as long as the base. 



Body — Robust, bearing long slender pro,ieetions on the dorsum of the 

 abdomen. 



Cornicles — Nearly one-fifth as long as the body, swollen at base and taper- 

 ing outwardly. 



Style — "One-half the length of the cornicles and globular at the tip, base 

 broad and tapering towards the constriction between the base and the tip." 



Anal plate — "Seemingly divided longitudinally and slightly emarginated 

 in the middle." 



D. acerifolii* (Thomas) Del Guercio. On Acer dasycarpum. Collected 

 by Davidson in the vicinity of Stanford University at Palo Alto, California, 

 and listed as Macrosiphuin acerifolii Thos. Jr. Ee. Ent. Ill, 380, 1910. 



CALAPHIS Walsh, 1863 

 Type C. betuella Walsh 



Body — Thorax long and slender, sides of abdomen with prominent tulier- 

 cles, each bearing a single hair. Forehead narrow. 



Antennae — Much longer than the body, on large broad frontal tubercles 

 with bases so close together as to give the forehead an appearance of the letter 

 "U," articles III, IV, and V hairy, the spur of VI about twice as long as the 



Wings — Long and slender, veins thick and dark, deflexed when in rest. 

 Cornicles — Short, a])0ut as long as the style, spindle-shaped. 

 Style — Short, thick, Imse broad with glol)ular tip, two-thirds as long as 

 wide. 



Anal plate — SWghtly emarginated in middle, lobes rounded. 



Key to California Species 

 Article III of the antenn;e longer than articles IV and V together, sen- 



soria confined to the basal half of III. castaneae 



Article III of the antenna^ not as long as IV and V together, sensoria 



confined to the basal two-thirds of III. betiilaecolens 



C. castaneae (Fitch) Gillette. Taken on Chestnut (Castanea sp.) at 

 Berkeley, California, by W. T. Clarke. Can. Ent. XXXV, 249, 1903. Also 

 collected at Palo Alto by Davidson. Jr. Ec. Ent. Ill, 376, 1910. 



C. hetulaecolens (Pitch) Gillette. On Birch (Betula sp.). Collected at 

 Berkeley, California, by Clarke. Can. Ent. XXXV, 249, 1903. Davidson has 

 also taken this species at Palo Alto, (California. Jr. Ec. Ent. II, 301, 1909. 



*This was first described as Siphonophora acerifoliae by Thomas, who afterwards 

 changed it to Drepanosiphum acerifolii, thercliy licaiiging the genus and the ending 

 of the species. Stli Kept. Ent. III., page 195, 1880. 



