Nov., 1919] Notes on Corythuca Biilbosa 0. cf D. 19 



FIFTH NYMPHAL STAGE. 



Length 2.2 mm. Greatest width 1.3 mm. Suboval; pro- 

 thoracic lobes rounded extending laterally, slightly more than 

 half the width of the mesothoracic lobes; anterior lateral angle 

 of mesothoracic lobe obtuse; wing pads extending posteriorly 

 to lateral tubercles on fourth abdominal segment; sides of 

 abdomen flattened; color brownish-black or black, except for 

 light area on posterior surface of mesothoracic wing pads and 

 a light median area posterior to the prothorax and extending 

 as far as and including median, dorsal portion of the second 

 abdominal segment and its pair of spines; fine, median, light, 

 dorsal line on prothorax; eyes lateral, consisting of numerous 

 distinct, red ommatidia; antennae white, sparsely hairy, almost 

 one-half as long as body. Legs white, sparsely hairy, hairs 

 short, claws slightly brownish; ventral surface brownish-black or 

 black, except median portion of thorax, rostrum and first two 

 abdominal segments, which are whitish; rostrum extending to 

 between bases of third pair legs. Head bears a pair of spines 

 just above the antennae, posterior to this pair is a median 

 tubercle bearing two spines, posterior to this tubercle and close 

 to anterior margin of prothorax are two large tubercles, each 

 bearing three prominent spines and several spine-like hairs. 

 Prothorax bears large, median tubercle tipped with several 

 spines and spine-like hairs and a pair of minute, median spines 

 posterior to this tubercle. Posterior lateral angle of prothoracic 

 lobe bears large tubercle with three large spines and several 

 spine-like hairs, on the lateral edge anterior to this tubercle are 

 five minute to medium sized spines. Mesothorax bears pair 

 median, dorsal tubercles, each bearing several small spines; 

 on the lateral edge of the mesothoracic lobe midway between 

 anterior and posterior lateral angles is a large tubercle bearing 

 two prominent and several smaller spines, anterior to this on 

 the lateral edge are five smaller spines. Centre of mesothoracic 

 wing-pad bears a tubercle-like elevation. Second abdominal 

 segment bears a median, dorsal pair of spines. Fifth, sixth and 

 eighth abdominal segments each bear pair median, dorsal 

 tubercles, each tubercle bearing a spine and several spine-like 

 hairs, median spines on eighth abdominal segment close together. 

 Posterior lateral edges of abdominal segments beginning with 

 the fourth each bear a prominent tubercle, each tubercle bearing 



