Tuer BIoLoGy OF THE CHRYSOPIDAE 1345 
C. chlorophana Burm. is included under C. oculata Say for the 
following reasons: 
1. The progeny of wholly-green-winged females have nearly always 
been oculata. Very few forms with wings of a permanently pure green 
have yet been obtained in rearings from any variety of oculata. 
2. The great majority of individuals of this variety have been 
found to be females. Males are scarce. Females of C. oculata of the 
dark medium type tend to be larger and have lighter wings, and so a 
series can be arranged from the darkest to the wholly-green-winged 
varieties. 
3. C. chlorophana crosses readily with any variety of C. oculata, 
including albicorns. 
4. It oceurs in nature with C. oculata and ean be taken in the 
same habitat.° 5 
5. The life history stages of the two forms are indistinguishable. 
The average length of time for the various stages of the lfe 
history of ten individuals of Chrysopa oculata reared in the laboratory 
in the early spring of 1916 was, respectively: egg stage, 5.4 days; first 
instar, 7.8 days; second instar, 3.9 days; third instar to spinning of 
cocoon, 3.9 days; within the cocoon, 26 days. 
This is by far our most abundant species. The writer has collected 
specimens in New York, Ohio, Virginia, Wisconsin, and Kansas. The 
species is a member of the field group, and in general collecting in the 
Kast it always predominates. It has the greatest range of any of our 
species. Descriptions of the stages from the medium-dark-type parent- 
age only are here given, as the types are all identical. 
Hog.—Hlongate-elliptical, light bluish or yellowish in color, normally on a 
long, hyaline stalk. Chorion smooth, unmarked. Micropyle button-like, white, 
rarely with a tinge of green.’ Length of egg, 1.03 to 1.1 mm.; diameter, 0.42 to 
0.49 mm.; length of stalk, 3.4 to 4.8 mm. 
First-instar larva (just hatched).—A large black spot on dorsum of head, 
deeply notched behind. Body gray to flesh-colored. Two setae from protho- 
racic tubercles; three from each mesothoracic and metathoracic tubercle; two 
each, an upper large one and a lower small one, from abdominal tubercles 2 to 
7; dorsal tubercles on thorax prominent, each bearing a single seta; an outer 
pair of dorsal tubercles and an inner pair of papillae on each of abdominal 
segments 1 to 6, each bearing a single seta. Dark spots around base of each 
of the abdominal dorsal papillae and tubercles. Total length of larva, 1.88 mm.; 
length of head, 0.54 mm.; length of mandibles, 0.39 mm.; width of head, 0.33 
mm.; width at metathorax, 0.38 mm.; length of longest setae on body, 0.47 mm. 
Second-instar larva.—Head with same coloration as in previous instar; 
antennae, jaws, and palpi yellowish to brownish in color; prothoracic tubercles 
prominent, dark in color; a patch of light brown or reddish brown on anterior 
side of stalk. About ten long and short setae from each tubercle. Mesothorax 
