THE BIOLOGY OF THE CHRYSOPIDAE 1293 
Alderson, 1911—Chrysopa dorsalis. 
Brauer, 1867—C. pallida. 
*Witch, 1855—C. novaeboracensis and others. 
Froggatt, 1904—C. ramburi. 
-*Garman and Jewett, 1914—C. oculata. 
*Howard, 1901—C. oculata. 
LaCroix, 1921—C. perla. 
*Lelong, 1890—C. californica. 
Lurie, 1898—C. septempunctata. 
*McGregor and McDonough, 1917—C. rufilabris. 
*Marlatt, 1895—C. oculata. 
Perkins, 1905—C. microphya. 
Réaumur, 1737—General. 
*Shimer, 1865—C. allinotensis. 
Van der Weele, 1909—C. jacebsoni. 
*Weed, 1897—C. oculata. 
*Wildermuth, 1916—C. californica. 
Zehntner, 1900—Chrysopa sp. 
The species studied biologically during their whole life history, or in 
part, for this account are as follows: Chrysopa oculata Say; C. oculata 
(Say) var. albicornis (Fitch); C. oculata (Say) var. chlorephana 
(Burm.) ; C. cha Fitch; C. chi (Fitch) var. upsilon (Fitch) ; C. nigri- 
corms Burm.; C. rufilabris Burm.; C. interrupta Schn.; C. quadripunc- 
tata Burm.; C. plorabunda Fitch; C. harrisw Fitch; C. lineaticornis 
Fitch; C. lateralis Guér.; C. bimaculata McClend.; C. cockerelli Banks; 
Meleoma signoretti Fitch; Allochrysa virginica Fitch. The keys given 
by Banks (1903) will be found adequate for separating these genera and 
species. 
Two species, Chrysopa oculata with its varieties, and C. nigricornis, 
have served almost equally as a basis for this account. These two were 
chosen because they are of wide distribution and because they represent 
two different habitats, the former being a garden and field species and 
the latter a tree species. 
THE EGG 
The eggs of the chrysopid species seen can be readily recognized and 
distinguished from the eggs of other insects by the fact that they are 
attached normally to a hyaline, hardened gelatinous stalk from four 
to eight millimeters long. The egg proper is elongate-elliptical in shape 
and green to yellowish green in color. 
There is a difference in the size of the eggs of different species, as well 
as in the length of the stalk. There appears to be a slight variation also 
