Vol. XXviii] ENTOMOLOGICAL NEWS 



ployed as nidi with varying degrees of success. The leaves 

 were punctured and the egg, when present, rested suspended 

 beneath, attached by the collar shown in the drawing PI. XIII, 

 Fig. i, to the upper surface margins of the incision. The 

 many perforations or slits through the leaves gave their testi- 

 mony to the many failures in attempting to employ so thin a 

 structure for nidification. 



Subsequently eggs have been found in floating Typha and 

 Juncus and have been deposited in the aquarium in the tissues 

 of both of these plants. 



The drawings give perhaps a better idea of the eggs and 

 young larvae than a description, but the following are sub- 

 mitted for the purpose of their precise recognition. 



THE OVUM. 



Size: 1.125 mlT1 - long by .406 mm. in its widest diameter. The size 

 increases somewhat with the development of the embryo within, which 

 causes a bulging of the stem in which the egg is inserted. 



Shape. The egg is an elongate oval when seen in surface view with 

 the cephalic end the more pointed. (Surface view = the side, a por- 

 tion of which is exposed to view as the egg lies imbedded in the stem.) 

 In lateral view it appears nearly straight in the outline of its upper 

 surface while the lower is quite strongly curved. 



Color. Pearly white when first laid the surface hexagonally reticu- 

 late as in the eggs of Notonecta. A smooth and shiny elongate oval 

 area occupies the anterior half of the upper surface. This is the por- 

 tion exposed and is margined by a whitish band which marks the union 

 of the egg with the surface of the stem when in situ. As the embryo 

 develops, the entire egg becomes deep greyish yellow and the red eye 

 spots and other red markings show through the chorion. -The part ex- 

 posed becomes dark amber in color and very shiny in appearance. The 

 surface appears reticulate under magnification. 



FIRST INSTAR NYMPH. 



Size (in millimeters) : body length 1.85, body width .625, head width 

 .5, distance between eyes .156. Fore limb: femur .25, tibia .35, tarsus 

 .25 mm. Middle limb .387. .333 and .275 and hind limb .625, .630 and 

 .625 for femur, tibia and tarsus respectively. 



Color. Ventral aspect: White the abdominal fringe of hairs, the 

 ventral abdominal tuft, the hair tufts before the hind coxae and those 

 of middle coxae black. The hairs fringing the hind tarsi are smoky 

 black as are the middle and fore tibia." Eyes dark red. No indication 



