November— December iSSS.] 



PSrCHE. 



125 



Head and thorax black ; abdomen 

 dull yellowish-brown, becoming black 

 in older specimens. Eyes dark. An- 

 tennae dusky-brown ; minutely tuber- 

 culous ; with man}''pores. Joints I and 

 II subequal in length ; III longest, 

 shorter than IV -f- V ; IV and V sub- 

 equal ; VI about one-half as long as V : 

 VII comparatively short, aboutequal to 

 V, rough and not tapering, with two 

 setae at tip. Cornicles long, dusky, cylin- 

 drical, roughened. Legs hairy; anterior 

 pair yellowish-brown with coxae, articu- 

 lation of femora and tibiae, tip of tibiae, 

 and tarsi dusky ; middle and posterior 

 pairs yellowish brown, with coxae, 

 band on middle of femora, tips of tibiae 

 and tarsi dusky. Cauda broad, brown 

 witii curved stiff' hairs on lateral and 

 posterior margins. Rostrum reaching 

 middle coxae, yellowish-brown. Teg- 

 ulae yellowisli-green ; insertion of veins, 

 costa, and cubitus yellowish-bi,"own ; 

 stigma olive brown. 



Described from two living specimens 

 taken on leaf and twig of Corujis sau- 

 guinea lo November 18S7. The gen- 

 ital organs of one were exposed. 



I have not been able to prove that 

 these males develop along with the 

 oviparous females from tlie migrating 

 winged viviparous form, and would not 

 be surprised if they were found to de- 

 velop on the same plants as the latter, 

 and fly to the colonies of the oviparous 

 form, as has recently been proven to be 

 the case with the hop plant-louse {Pho- 

 rodon humuli Schrank) . 



Oviparous female. 

 Length of body . . . 1.30 mm. 

 Width of body .... 0.63 mm. 



Length of antennae . . 0.57 mm. 

 " " cornicles . . 0.06 mm. 

 " " canda . . . 0.08 mm. 



Green, with a glaucous bloom : some- 

 what flattened, widest at middle and 

 tapering both ways. Cornicles and 

 margin of cauda, dusky ; sub-quadran- 

 gular dusky spot on anus. Eyes red- 

 dish-brown. Antennae slender, light 

 yellowish-brown, with dusky tips ; 

 6-jointed, I and II short. III long. IV 

 two-thirds as long as III, filament long. 

 Rostrum light yellowish-brown with 

 dusky tip ; reaching posterior coxae. 

 Legs light yellowish-brown, tarsi 

 with dusky tips ; coxae greenish ; pos- 

 terior tibiae distinctly sv\ollen. Cauda 

 hairy. 



Described from one specimen taken 

 in act of ovipositing in axil of twig of 

 Cor 7ms saugiimea^ 24 October 1SS7. 



Of many other specimens examined 

 the only perceptible difference was in 

 the depth of coloring of the body, the 

 older specimens becoming more or less 

 brownish. 



Egg- 



Elongate oval. 0.95 mm. long. 0.23 

 wide. Green when first deposited but 

 becoming black by exposure. 



Described from a specimen just laid 

 b}' the female mentioned above. Pro- 

 bably it would have shrimk some after 

 being laid. 



Aphis Sp. on Amaranths albus. 



On 19 October 1887, I foinid a 

 species of Aphis very abundant on a 

 plant of Amaranths albus growing 

 near one of the university barns. So 

 far as I could see the species was rep- 



