Vol. XXVli] ENTOMOLOGICAL NEWS. 445 



Two new Aphids, Capitophorus shepherdiae and 

 Siphocoryne aquatica (Hem., Horn.)* 



By C. P. GILLETTE and L. C. BRAGG, Fort Collins, Colorado. 



(Plates XXIV, XXV.) 



Capitophorus shepherdiae, n. sp., Plate XXIV. 



In the Journal of Economic Entomology, 1915, page 379, at- 

 tention was called to an aphid that had been found associated 

 with Rhopalosiphnm hippophaes and Myxus braggii on El- 

 aeagmts and Hippophaes as over-winter hosts, which so re- 

 sembled either of these species in general appearance as to 

 be easily mistaken for them. This species has since been iso- 

 lated, and its development followed through the year, proving 

 it to be a different species and one that seems to be undescribed. 

 This species may have an alternate summer host plant, but we 

 have not been able to find one and the lice remained on Shep- 

 herdia all summer in 1915. 



This species is readily separated from any other we know 

 by the combination of three characters, as follows : spur of 

 antenna less than one-half as long as the cornicle in the ap- 

 terous form, cornicle clavate, and dorsum of abdomen con- 

 spicuously decorated with several rows of short, stout, capi- 

 tate hairs. Descriptions of the different forms of this species 

 follow. All measurements are in millimeters. 



Fnndatrix. Color pale green, or yellowish green; dorsal surface 

 set with numerous short, stout capitate hairs on small, cone-shaped 

 tubercles, there being one marginal and three lateral rows on either 

 side of the median line of the abdomen and metathorax ; antennse 

 barely reaching to the abdomen, set on short tubercules, 5-jointed. first 

 joint with rather prominent swelling on the inner side, giving it the 

 appearance of being bent at a right angle; joint III as long as IV and 

 V together; relative lengths of joints beyond the second varying little 

 from the following proportions: 16: 8: 6: 7 (spur); total length, .50 

 to .60 ; primary sensoria only ; vertex flat, but set with tubercles that 

 bear capitate hairs; capitate hairs on antennal tubercles and joints I 

 and II of the antennae; cornicles rather long, (.40), slender towards 

 the base, clavate distally, due to a thickening on the inner margin, and 

 slightly curved outward near the distal end; cauda but little longer 

 than its width at base, and somewhat blunt at the tip; legs rather short 



