NO. 1687. THE THORAX OF /A >ff;r7VS'— »S'.VO/)(;«.KSS. 593 



Plate 50. 



Fig. 132. ValoHomn ticnitator, metatorsuui, dorsal. 

 138. Calusoma scrutator, metatergimi, ventral. 



134. Hydrophilus triangularis, metatergum, dorsal. 



135. Melohmtha vulgaris, luetatergimi. dorsal. 



Platp^ 57. 



Fig. 136. Dytiscus dauricus, nietaterfiuiu and rislit axillaries, dorsal. 



137. Dytiscus dauricus, nietatergnui, ventral. 



138. Mclolontha vulgaris, nwtanotum, ventral. 



130. Mclolontha rulyaris, uietai»sendonotuin, anterior. 



Platk 5S. 



Fig. 140. Cyllciic robinia. uietatergnni. 



141. Corydalis cornuta, pupa, mesoterguni and base of right wing. 



142. Corydalis cornuta, adult, mesoterguni, dorsal. 



143. Corydalis cornuta, adult, metanotuui, ventral (pseudouotum removed). 



Plate 59. 



FMg. 144. Corydalis cornuta, larva, nietatliorax, lateral. 

 145. Corydalis cornuta, pupa, metapleurum. 

 140. Tricliopteran pupa, mesopleurum. 

 147. Corydalis cornuta, adult, metapleurum. 

 14S. Xcuronia occllifcra, adult, mesopleurum. 



149. Pliassus argcntiferus, thorax with wings removed, and l)ase of al)do- 



men, lateral. 



Plate 00. 



Fig. 150. Phassus argcntiferus, mesoterguni and first and third axillaries with 

 posterior part of axillary membrane of right wing. 



151. Phassus argcntiferus, metatergum and first abdominal tergum. 



152. Phassus argcntiferus, prothorax with pronotum separated, and micro- 



thoracic plates, lateral. 



153. Phassus triangularis, mesopleurum and coxa, external. 



154. Phassus triangularis, mesopleurum with coxa removed, internal. 

 1.^)5. Protoparce cingulata. in-escutum and prephragma of mesonotnm, 



anterior. 



150. Protoparce cingulata, mesotergum. 

 157. Protoparce cingulata, metatergum. 



Plate 01. 



Fig. 158. Protoparce cingulata, metapleurum. 

 159. Protoparce cingulata, mesopleurum. 

 100. Parasiohla sp. (Tenthredinidje), tliorax and base of abdomen, lateral. 



161. Cimhex americana, mesotergum and base of right wing. 



162. Cimhex americana, propleurnm. 



163. Cim,l)cx americana, niesotliorax and pronotum (Vi). lateral. 



164. Cimher, americana. nietatliorax and first abdominal segment (median 



segment), lateral. 

 Proc.N.M.vol.xxxvi— 09 38 



