THE CANADIAN ENTOMOLOGIST. 249 



The three individuals bred emerged, one in fifteen days (the only one 

 that eventually reached maturity), and the other two, from ova deposited 

 in my aquaria, in twenty days. Some others were varying periods in the 

 embryonic stage, but these were not closely observed, although in general 

 the period was about three weeks or less. 



First Nymphal Instar. 



Form in a general way resembles the adult. It is, however, broader 

 in proportion to length. The head, including the eyes, is broader than 

 long, excluding the rostrum. Each eye is less than one-third the width of 

 the head, round and projecting beyond the thoracic margins. The thorax 

 is a little under one-third the total length of the bug. It shows the three 

 rings. 



The rostrum is four-jointed, stout, the first joint stoutest, about twice as 

 long as the second, and subequal to the third and fourth. The fourth or 

 terminal joint is furnished with tactile hairs, as in the adult, the antennae 

 are short, club-shaped, one-jointed, the extremity nearly as broad as the 

 length, situate near the basal joint of the rostrum. The thorax is a little 

 under one-third the total length of the bug, and shows the three rings. 

 The bifid air-tube is absent, its place being taken by the blunt extension 

 of the terminal abdominal segment, as described in connection with the 

 respiratory system. The legs are comparatively stout, the second and 

 third pairs being nearly as long as the entire bug. The tarsi of the first 

 l)air are one-jointed and entirely destitute of claws; those of the second and 

 third pair are also one-jointed, armed with long claws. The tibiae of 

 these two pairs are armed with a comb-like row of stout spines going 

 partly around at the distal end, at the tarsal joint, and are furnished with 

 a few coarse hairs at this end also. The first pair of pedes is the 

 counterpart of those of the adult, except that they are much broader 

 in proportion, and do not show the blunt, so-called apical tooth in the 

 femur. 



Size : Long., 8 mm.; lat., i mm. at thorax ; air-tube, long., 1.5 mm. 



Colour : Brownish of varying shades, including the legs, which are 

 banded with lighter rings. The eyes are black or dark brown. 



Markings : None sufticiently definite to be called such. There is a 

 lighter median line in the thorax. 



The nymph that finally reached the adult came to the first moult in 

 fourteen days, the other two in eight days. The latter were from bred 

 ova, and the transformation took place in July, 



