December, '19J 



WELLHOUSE: HAWTHORN LACE BUG 



445 



of the prothorax have increased in size and the distal part of the wing pads is yellow- 

 ish, so the body appears to have two light bands across it. The entire dorsal surface 

 is covered with minute spinules as before. 



6 



Fig. 25. — 1, Egg; 2, egg after liatciiing; 3, first stage nymph; 4, second stage 

 nymph; o, third stage nyinj)h; (5, fourth stage nympli; 7, fifth stage nymi)h. 



The larger spines in all the stages of the nymphs correspond exactly 

 in position and appearance with those described by Morrill for the oak 

 tingid, Corylhucha nrcuatn (Psyche 10: 128), but in Corythucha bcllula 

 the minute awl-shaped spinules are more jircvalent on the dorsal sur- 

 face and the nymphs are smaller than C. nrcuala nymphs. The spines 

 borne on elongated bases have an eversible sac on the lip which gives 

 them a trumpet shape when it is drawn in and a round tip when it is 

 extended. 



