12 N.S. ENTOMOLOGICALSOCIETY. 



tuberosities, most of penultimate abdominal segment and legs light yellow. Length 

 1.7 mm.; width of abdomen .55 mm.; width of head .85-. 9 mm. 



Third Instar. More elongated, tuberosities elongated and more complex. Head, 

 relatively smaller, curved at top, rather flatter on cephalic margin; spines larger and 

 more prominent; mouth parts directed straight backward. Prothorax, more strongly 

 developed and more strongly arched at top, extending backwards between and just be- 

 yond the mesothoracic tuberosities. Mcsoihorax, and Metathorax, with caudal angles 

 slightly projecting, forming small wing pads. Abdomen, more completely covered with 

 short hairs. Color, much as preceding instar, yellow coloring varying in different 

 specimens, but generally rather less than in preceding. Length, 2mm.-2.5mm., width 

 of head .95mm. -lmm.; width of abdomen .66mm. 



Fourth Instar.- — Body more elongate, tuberosities relatively longer, narrower 

 and more complex; integument more roughened and more hairy than in preceding in- 

 stars. Head, with eyes situated almost midway between dorsal and ventral mar- 

 gins. Prothorax, still more strongly developed than in preceding, with concavity ap- 

 parent on dorsal surface; segment projects backward beyond mesothoracic tuberosities. 

 Mesothorax and Metathorax with caudal angles extending backward, attaining the second 

 abdominal segment. Abdomen, more completely covered with short spinous 

 hairs; tuberosities longer and more slender. Color, as in preceding with yellow colora- 

 tion not so abundant. Length, 2.66mm.-2.83mm.; width of head 1.009-1. lmm. 



Fifth Instar. — Body longer and more strongly arched dorsally. Covered with 

 small hairs. Integument roughened. Head, more or less oblong in shape, being flat- 

 tened on sephalic margin and with a slight concavity on dorsal surface. Prothorax, 

 greatly developed, curving up abruptly from head, forming first a truncate protuber- 

 ance, behind which there is a concavity rising again gradually to form a large rounded 

 protuberance, exceeding in height the mesothoracic tuberosities and extending backward 

 ward over the metathorax and first abdominal segment. Mesothorax and Metathorax, 

 with well developed wing pads reaching midway on fourth abdominal segment. Ab- 

 domen, arched dorsally; covered with short hairs. Tuberosities longer and more slend- 

 er than preceding instars, projecting backward slightly. Color, mostly shining black; 

 mesothoracic tuberosities parts of wing pads and of last abdominal segments yellow. 

 Eyes, dark red. Length 3mm.; width of head 1.166-1. 499. mm.; width of abdomen .832- 

 1.009 m.m. 



Explanation of Terms. 



Anterior : In front; before. 



Clavus : The oblong portion at the base of the interior margin of the wing. 



(Plate 6, f g. 4 and 5.) 

 Clypeus : The portion of the head below the front. (Plate 2, fig. 9.) 

 Corium : \"he elongate middle portion of the wing, separated from clavus by the 



claval suture. (Plate 6, fig. 4 and 5). 

 Dorsal : Pertaining to the upper surface 



Elytra : The outer wings. 



Foliaceous : Flattened and leaf-like. (Plate 6, fig. 2.) 

 Humeral : Relating to the shoulder or humerus. 

 Humerus : The shoulder. 

 Inferior > Beneath or below. 

 Lateral : Relating or attached to the side. 

 Mesothorax : The second or middle thoracic ring, bearing the second pair of legs and 



the first pair of wings. 

 Metathorax : The third thoracic segment bearing the third pair of legs and the second 



pair of wings. 

 Metopidium : Anterior surface of pronotum (Plate 2, fig. 9). 



