Vol. XXviii] ENTOMOLOGICAL NEWS. 357 



molt on emerging has been observed. The embryonic period has been 

 noted as lasting from 7 to 23 days, but the controlled lot took only the 

 former time, and the majority took only 8 days for development. 



Nymph, First Instar. — Antennae rather stout but long, joint 4 long- 

 est, 2 and 3 shortest and equal, i slightly longer; 2 and 4 stoutest, 4 

 fusiform, 3 pedicellate at base expanding to tip, club-shaped. Eyes 

 small, round, set very far apart owing to broad head. Rostrum stout, 

 joint 2 shortest, 3 longest, then 4, then i, which is stoutest, 2 is ring- 

 like, 3 is more or less long ovoid, 4 slenderest, pointed tapering. All 

 legs are equally stout and comparatively long; all' tarsi are i-jointed, 

 all tibiae have combs at the distal end. Fore tibiae shorter and 

 stouter than femora; tibia and femur of intermediates subequal; hind 

 tibiae longer than femora, which have slender long spines or stiff 

 hairs. Tarsal claws long, slender, simple. 



The little bugs have a family resemblance to the adult — they are 

 rounded posteriorly and the legs and antennae are much thicker in 

 proportion than in the adult. The abdomen is comparatively short and 

 the legs in consequence appear set very far back. When fully set, the 

 nymph is very dark, a deep slate grey. In molting, the entire top of 

 the head lifts off like a lid hinged at the clypeus, and the skin splits 

 from the thorax through the abdomen. 



In this and the succeding instars, much of the descriptions has been 

 taken from balsam mounts and from cast or molted skins. 



The first instar lasted from 2 to il days, the controlled brood took 

 6. 



Nymph, Second Instar. — In this instar the second antennal joint is 

 the shortest, 4th longest and stoutest, nearly as long as the other 

 three taken together, and ist and 3d equal. The rostrum is as before, 

 except that joint 2 is narrower and more ring-like, joint 3 longest, but 

 little longer than 4 and twice as long as i. The abdominal segments 

 are ring-like, telescoped; the abdomen is very short and truncate, but 

 comparatively longer than in the preceding instar, so the legs do not 

 appear set so far back. The legs are as before, except that the femora 

 of the second pair are longer than the tibiae. The molt is as in the 

 preceding instar. 



The second instar lasts between two and six days, the majority 

 taking 3 or 4 days. 



Nymph, Third Instar. — The antennae continue as before proportion- 

 ally, but the second joint is but slightly shorter than the ist and 3d and 

 the 4th is one-fifth shorter than the other three taken together; joint 

 3 is slenderest, but all are nearly of equal thickness. Rostrum as before. 

 The legs are slenderer but otherwise as before; the second and third 

 tibiae are slenderer than the femora. The chief visible changes are in 

 the proportions of thorax and abdomen, which is much longer ac- 

 tually and comparatively, and the segments are more distinct. 



