180 



B. NEUMOEGEN AND H. G. DYAR. 



Sy?iopsis of the Suborders of the Lepidoptera. 



Wings united by a modification of the base of primaries; venation essentially 

 similar in the two wings JUGATE. 



Wings united by a modification of base of secondaries; venation dissimilar in 

 the two wings , FRENAT^. 



- lloJb 



Venation of Heterocampa lunata Hy. Edw., illustrating nomenclature of veins. 



This division is sharp, not complicated by any intergrading forms. 

 It should be followed directly by a synopsis of families in each sub- 

 order, for we have not found it possible to define a series of super- 

 families with satisfactory exactness. However, several divisions of 

 the Frenatse may be recognized, though they are not sharply sepa- 

 rated. 



