THE CANADIAN ENTOMOLOGIST. 271 



During the last six months I have had about fifty specimens in con- 

 finement, representing all the stages of the insect. They were nearly all 

 obtained in one limited locality, about the edge of a small pond near the 

 Maryland Agricultural College. I found every stage in this locality ex- 

 cept the egg. Two females oviposited in the breeding jars, and I now 

 have larvae about two months old. I present the following description of 

 the insect in all its stages : —  



1. The egg. — The eggs were deposited in confinement in irregular 

 heaps without any apparent arrangement. The number is only 40 to 50, 

 though it is stated that G. vulgaris deposits 200 to 300. There is an 

 irregular enlargement of one of the canals, about an inch and a-half in 

 diameter, in which the eggs are placed. 



The egg is of a dirty whitish or light brown colour, opaque, with no 

 distinct external markings. Length, about 3 mm.; width, 1.7 mm. Shape 

 slightly ovoid-reniform. 



The date of the deposition is a little uncertain. May 20, 1892, I 

 made extensive excavations in their burrows, but found no eggs, though 

 I took three gravid females ; one of these was dissected, and the eggs ap- 

 peared pretty well matured, though not full size. Two females were 

 placed in confinement, one had oviposited June 8, eggs from the second 

 were not found till June 25. The eggs of the first had hatched June 18, 

 ten days after they were found. The eggs of the second hatched between 

 Aug. ist and loth, about a month and a-half after the first lot, and five or 

 six weeks after they were deposited. Both were subjected to the same 

 conditions. 



2. The larva. — When first found the larvse may have been a week 

 old. They closely resemble in appearance the mature insect. Length, 

 6 mm. ; antennae long, 37 mm., anal stylets, 3 mm. Head and thorax 

 shining black, with median dorsal line lighter. Abdomen lighter in colour 

 than thorax ; the dorsal part of each segment dark brown, the space be- 

 tween segments creamy ; the first three rings very dark, the rest lighter, 

 except the 7th, which is generally broad and dark. The underside of the 

 body is creamy white. Anterior pair of legs light brown, middle pair 

 with femora darker, posterior pair darker except at the joints, tarsus of 

 first pair broad, toothed, as in imago. Legs and abdomen slightly 

 pubescent. Before the first moult the larvae have the power of leaping 

 several inches. After this they do not seem to have this power, and are 

 more sluggish in their movements. After the first moult they have the 



