STATE HORTICULTURAL SOCIETY. 179 



three black points each side; wings hyaline, transverse veins of the front 

 pair more or less black. Length to the tip of the wings, six to seven- 

 tenths of an inch ; wings expanded measure rather more than one inch. 



Chrysopa illepida, Fitch. The Disagreeable Golden-eye. 



Similar to and probably a variety of the preceding ; has the four 

 black points on the occiput united into two lines, and a part only of the 

 transverse veins of the front wings black. 



Chrysopa chlorophana, Fitch. The Yellow-headed Golden-eye. 



Similar to the preceding, and probably a variety also of C. coculata. 

 Pale yellowish-green, with a light yellow head • the wings more rounded 

 at the apex, with the veinlets mostly green. Expands i.io inch. 



■ 



Chrysopa ploribiuida, Fitch. The Weeping Golden-eye. 



Very pale green, with a paler dorsal stripe along the body ; head 

 pale yellowish, with a small black line at the eyes ; antennae whitish, with 

 the apex yellowish ; legs greenish white, feet yellow. Sometimes there is 

 a reddish or orange spot each side of the head. Expansion one inch. 



Common in Illinois. 



Chrysopa pseudographa, Fitch. The Counterfeit Golden-eye. 



Much like the last, but of a straw color without any tint of green ; 

 head brighter yellow, with a small black line each side of the face ; anten- 

 nae, feet and veins of the wings, whitish ; abdomen with a narrow white 

 dorsal line and an apical yellowish spot on each side of each segment. 

 Expansion one inch. 



Although these and several others are given by Dr. Hagen and Dr. 

 Fitch as distinct species, it is more than probable they are but varieties of 

 one or two species; at least they have similar habits, and hence their dis- 

 tinction is a matter of but little consequence to the horticulturist. They 

 are his friends, and so far as possible should be protected ; and whenever 

 he observes the eggs mounted on their little transparent hairs he should 

 be careful to leave them uninjured, as the larvae will soon destroy the 

 plant-lice among which they are placed. Nor do they confine their 

 attacks to Aphides alone, but prey with equal avidity on a host of other 

 injurious insects, even the unsavory chinch-bug is not free from their 

 attacks. • 



They usually pass the winter in their cocoons, though some appear to 

 live on until spring in the perfect state. 



Other inveterate enemies of the plant-lice are certain two-winged 

 flies which belong to the order Diptera anil family Syrphidce, of which the 

 genus Syrphiis is the type, or rather contains the typical species. 



These somewhat resemble the common house-fly in size and shape, 

 but are much handsomer, being usually of a bright yellow color, with 



