EXPLANATION OF PLATE XLIX. 



Fig. ]. — Adelocephala arrjyracaniha [=croixit(i^; natural size; copied frum Burmeister. 



Fig. 2. — Adelocephala isias, stage IV, dorsal armature of the three thoracic and first three abdominal segments (the 

 dor.sal horn of the third thoracic segment omitted); 2a, stage V, the dorsal tubercles; a', vestiges of 

 the prothoracic ones; h', .second thoracic (i and Hi); (■' third thoracic (/ and )//); 2/i, dorsal tubercles 

 ()', ill) on first and sixth abdominal segments; VII i, dorsal (i) on seventh abdominal segment; 2c. 

 armature of eighth and ninth al)doininal segments, including the caudal horn; Id, caudal horn and 

 suranal plate of stage W \ 2?, suranal jilate, dorsal view. From San Antonio, Tex. 



Fig. 3. — Adelocephala isias, dorsal armature of first thoracic segment (I); .second and third, II, III, and first two 

 abdominal segments^ 3a, of the last abdominal segments, including the caudal horn. From Browns- 

 ville, Tex. 



Fig. 4. — Adelocephala from B-azil (see p. 14 1 Ih. i. prothoracic; th. 21, lli. 2iii, dor.sal and subdorsal horns (i, "'); "'> "^ 

 dorsal spines of first and second alidoininal segments; c, caudal horn. 



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