404 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 5 



APHID NOTES FROM CALIFORNIA 



By W. M. Davidson,' U. S. Bureau of Entomology, San Jose, Cal. 



The following paper reports several plant-lice not heretofore found 

 in California, of which three species are new to science. A few sexual 

 forms are also dealt with and illustrated. 

 Cerataphis lantaniae Boisd. 



Taken in the spring of 1912 on ferns in the greenhouses of Stanford 

 University, Cal., by Mr. H. Morrison. 

 Phijllaphis coweni Gillette. 



Syn. Cryptosiphum tahoense Davidson (Jour. Econ. Ent. Dec. 1911). 

 I have not seen the types of Phijllaphis coweni but after comparing 

 Gillette's description of this aphid (Can. Ent. xxxvii p. 125, 1905) with 

 my description and specimens of C. tahoense I conclude that there is 

 but one species, 

 Calaphis hettdaecolens Fitch (Fig. 1, 2). 



Alate male. Pale yellowish-green. Head, prothorax, thoracic lobes and two 

 spots at the base of the wings black. Antennae reaching beyond cauda, yellow, 

 apices of joints 3-6 and the filament dusky. Length of the joints as follows, — 3, 4, 5, 

 filament, 6, 1, 2. Legs yellow, femoral apices brown, base and apex of tibiae and the 

 tarsi dusky. Wings large, stigma hght gray with a large paler central area. Basal 

 third of stigmatic vein obsolete. Second fork of third discoidal slightly nearer to the 

 first fork than to apex of wing. Subcosta and discoidals stout, dark brown. Abdo- 

 men narrower than thorax, shorter than the head and thorax combined, greenish- 

 yellow, with a dorso-median black transverse bar on all the segments except the last. 

 Cornicles pale, almost as broad as long, situated on segment 7. Pale lateral tubercles 

 occur on segments 2-6. Last segment dusky grey. Beak very short, reaching 

 first coxse, stout and pale, the tip black. Under side of the thorax grey. Sensoria 

 as foUows:— III, 18-24: IV, 0:V, 1:VI, 1. 



Measurements: Body, length 2.05mm Antennal joints 

 " width 1.54mm 

 Wing expanse 7 . 70mm 

 Cornicles . 08mm 



Oviparous female. Pale yellowish-green, caudal half of abdomen with a reddish 

 tinge. Antennae reaching to cornicles or beyond, black, joints 1, 2, basal half of 

 both 3 and 4 paler. Eyes red, Legs pale, base of tibiae and tarsi black. Cornicles 

 longer than broad, the mouth flaring. Dorsum of body sometimes with indefinite 

 dusky markings. Abdomen oval, the last three segments forming a conical addition. 



'Published with the permission of the Chief of the Bm-eau of Entomology. 



