Riley. 
101 
SlPHOXOPHOUA FRAGARIA3. 
Koch var immaculata. 
\ 
At this point Mr. Monel! takes occasion to criticise my “JCist of 
Aphidini ” as being incomplete in omitting this and some other spe¬ 
cies especially those of Haldeman and Rafinisque. This species is 
given in the list. The variety it is true is not mentioned, nor are the 
varieties of other species mentioned in that brief paper. Neither 
Haldeman’s nor Rafinesque’s descriptions were accessible to me at that 
time, and for the same reason I will have to omit them from this 
report, but thanks to his criticism, I can insert the list as he has 
given it. 
The want of books is sadly felt by entomologists of the west, who 
like myself, do not have access to large libraries. Besides those men¬ 
tioned, there are two or three other European works devoted entirely 
or in part to Aphides which after repeated trials I am unable to pro¬ 
cure. 
Aphis ujtescens. Monel 1. 
“ Winged individuals: General color bright lemon-yellow. Anten¬ 
nae somewhat pilose, a little shorter than the body. Tlie length of 
the joints is quite variable; in some specimens the third joint is sub¬ 
equal to the preceding, while in others it is one-third longer. Seventh 
joint filiform, very much longer than the third. Honey-tubes some¬ 
what dusky, gently tapering from base to apex, the apical diameter 
being about two-thirds that of the base; about three times as long as 
the tarsi. Style dusky yellow, blunt at apex, when fully extended, 
about half the lenth of the honey-tubes. Fore wings hyaline; stigma 
dusky yellowish, acute at the apex, which is opposite the middle of 
the stigrnal vein. Stigmal vein in one regular curve. Discoidal veins 
of the hind wings nearly parallel; subcostal comparatively straight. 
Length 1.65-2.03 mm; to tip of wings 3.04-3.5 4 mm. 
On Ascelpias syriaca. July, September, St. Louis, Mo. Montrose, 
Iowa. Rock Island, Ill. Cordova, Ill.” 
This is probably a variety of Aphis asclepiadis. Fitch, which J 
have placed in Siphonophora , on account of the frontal tubercles, and the 
rather long honey-tubes. As will be seen by reference to my descrip¬ 
tion, some of the individuals are yellow. The honey-tubes of my speci¬ 
mens taper as do those described by Mr. Monell. The rather short 
antennae and not very prominent antennae tubercles, approach Aphis , 
but the characters taken together, appear to me to predominate in 
favor of Siplionophora as its appropriate genus. 
I may also state here that the remarkable differences between speci¬ 
mens of the same colony, had I not found them feeding together, and 
evidently the progeny of the same “colony foundress,” 1 would at 
once have decided they were different species. Some dark green, al- 
