760 Pomona College Journal of Entomology 



DREPANAPHIS Del Guercio, 190Q 



Syn. Phymatosiphum Da\is 

 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— Uohusit, bearing long slender projections on the dorsum of the 

 abdomen. 



Cornicles — Nearly one-fifth as long as the body, swollen at liase 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. aceiifolii* (Thomas) Del Guercio. On Acer dcsyearpum. Collected 

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

 and listed as Macrosiphum acerifolii Thos. Jr. Ec. Ent. III. 380. 1910. 



CALAPHIS Walsh, lcS63 

 Type C. betuella Walsh 



BoJi/— Thorax long and slender, sides of abdomen with i)romini'ut tuber- 

 cles, each bearing a single hair. Forehead narrow. 



Antennae — ]\Iucli 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 

 base. 



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



Cornicles — Short, about as long as the style, spindle-shaped. 



Style — Short, thick, l)ase broad with globular tip, two-thirds as long as 

 wide. 



A)i(il plate — Slightly emarginated in middle, lobes rounded. 



Key to California Species 

 Article III of the antenna' longer than articles IV and V together, sen- 



soria confined to the basal half of HI. castaneae 



Article III of the antenna' not as long as IV and V tt)gethcr. sen.soria 



confined to the basal two-thirds of ITT. betulaecolens 



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

 Berkeley, California, by W. T. Clarke. Can. Ent. XXXV, 24!), 1903. Also 

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



C. betulaecolens (P^iteh) 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 Drepancsiphum acerifolii, tlicrebv hcaiiKing the genus and tlie ending 

 of the species. 8th Kept. Ent. 111., page 195, 1880. 



