October, '12] DAVIDSON: APHID NOTES 40.') 



Measurements; Body, length 3.13mm Antennal joints I .142 



" width 1.37mm II .076 



Cornicles .16mm III .682 



IV . 491 



V .417 



VI .191 



fil. .433 



The sexual forms occur in November on cultivated Birch. Locality, 

 Oakland, Cal. 



Calaphis castaneae Buckton (Figs. 3, 4). 



Alate male. General color lemon. Eyes dark red. Antennae reaching bej-ond 

 the tip of the abdomen, dusky, joint 3 the longe.st and three times as long as the 

 filament. Sensoria distributed as follows; — joint 3, 20; joint 4, 7; joint 5, 8; joint 

 6, 3-4. Thoracic lobes and scutellum brownish. Wings of medium size, stigmatic 

 vein deeply curved, second fork of third discoidal slightly nearer to the wing apex 

 than to the first fork. Stigma light browm, central portion hghter. Legs pale; 

 tarsi, tibial apices and base of hind tibiae dusky. Abdomen narrower than the thorax, 

 tapering gradually caudad, each segment with a median oval dusky area and dusky 

 lateral spots. Cornicles dusky, almost twice as long as broad. Cauda 

 globular, dusky, shorter than the cornicles. Beak pale, tip black, reaching midwaj' 

 between first and second coxae. 



Measurements; Body, length 1.33mm Antennal joints 



" width .50mm 



Wing expanse 4 . 87mm 



Cornicles . 06mm 



Oviparous female. General color pale lemon yellow. Eyes dark red. Antennae 

 not quite reaching to cornicles, pale, with the articulations and filament dusky; 

 joint 3 longest, twice as long as the filament or as joint 5. Body oval, tapei-ing 

 posteriorly to the cornicles, beset with many long delicate spines. Abdominal 

 segments 1-8 each with two oval, transverse dusky areas on the dorsum. Cornicles 

 pale, twice as long as broad. Cauda bluntly rounded, short. Legs pale, tarsi and 

 tibial apices dusky. 



The sexual forms are found on Chestnut in early November. Local- 

 ity, San Jose, Cal. 

 Euceraphis betulae Kalt. (Fig. 5.) 



