SANBORN : KANSAS APHIDID.E. 47 



Aphis rumicis Linn. Plate XI, fig. 67. 



Head black. Antennte dark, imbricated, and nearly bare 

 length of segments : I, 0.07 mm. ; II, 0.07 ram. ; III, 0.37 mm. 

 IV, 0.23 mm. ; V, 0.21 mm. ; VI, 0.12 mm. ; VII, 0.23 mm. 

 total length, 1.30 mm., extending to the central part of the ab- 

 domen. Sensoria circular and unequal in size ; eight to ten on 

 the third joint, none on the fourth, the usual distal one on the 

 tifth, and one large one at the distal end of the sixth. Eyes 

 black ; ocular tubercles prominent ; ocelli not very conspicuous. 

 Beak dark, 0.54 mm. long, extending to the mesacoxae. 



Prothorax brown, narrow in length and slightly overlapped 

 by the thorax, which partly hides the lateral tubercles. The 

 thorax is black and arched. Wings pellucid, discoidals black, 

 costal and subcostal dark brow"n,the latter bordered caudad 

 with a light brown line. Stigma dark, 0.16 mm. broad and 

 0.66 mm. long; total wing expansion, 6.88 ram. Legs dark 

 brown, hirsute, and normal in length. 



Abdomen dark; honey-tubes black, imbricated, cylindrical, 

 and 0.14 mm. long, being equal to the tarsi in length. Style 

 black, hirsute, and 0.16 ram. long, being but little longer than 

 the honey-tubes. Total length of the body, 1.90 rara. 



This forra was taken May 5, on dock (Riimex crispus). It is 

 gregarious and colonizes the terrainal steras. The colony gives 

 the parts a black appearance, on account of their proxiraity to 

 each other. 



Aphis, n. sp. Plate XIV, fig. 75. 



Head black. Antenn^r black with but few hairs, and imbri- 

 cated ; length: I, 0.05 rara.; II, 0.05 rara.; 111,0.25 ram.; 

 IV, 0.18 mm. ; V, 0.16 rara. ; VI, 0.10 rara. ; VII, 0.19 mm. ; 

 total length, 0.99 rara., extending to the raesocoxae. Sensoria 

 circular, unequal in size, and nuraerous, sixteen to thirty on 

 the third joint, eight to ten on the fourth, the usual distal one 

 and soraetiraes two or three others on the fifth ; a cluster of 

 small ones and a large one at the distal end of the sixth. Eyes 

 black ; ocelli conspicuous, bordered with black ; ocular tubercles 

 prorainent. Beak dark, 0.45 ram. long, extending half-way to 

 the raesocoxie. 



Prothorax dark, lateral tubercles prorainent, and as broad 

 as long. Thorax black, AVings subhy aline, veins raediura 



