412 PROCEEDINGS OF THE ACADEMY OF [June, 



Measurements {in millimeters). 



Philadelphia, Pa. 

 Specimens here described.^^ ^* 



9 cf 9 cf 



Length of body 11.5 10. 9.5 10.6 



Length of pronotum 2.3 2. 2.4 2.1 



Caudal width of pronotum 3. 2.8 3. 3. 



Length of tegmina 7.4 7. 4.1 6.1 



Length of wings 15 . 14 . 



Length of caudal femur 7.8 7.3 8. 7.6 



Greatest width of caudal femur 2.7 2.4 2.7 2.7 



Length of ovipositor 9.4 8.4 



Oxford, Mass." MacNab's Id., N. S.^s 



9 c? 9 cT 



Length of body 8. 8. 9. 7.2 



Length of pronotum 1.8 1.8 1.7 1.8 



Caudal width of pronotum 2.1 2.3 2.6 2.3 



Length of tegmina 3.8 4.9 3.7 4.4 



Length of wings 



Length of caudal femur 6. 5.7 6.6 5.7 



Greatest width of caudal femur .1.9 1.8 2.1 2. 



Length of ovipositor 6.8 7. 



Specimens from Aweme, Man., show characters intermediate 

 between A^. fasciatus abortivus and A", fasciatus. 



The upper dotted line includes all of the specimens of A^. fasciatus 

 abortivus. 



The lower dotted line separates the majority of specimens of 

 N. fasciatus socius (on the left) from the majority of specimens of 

 A^. fasciatus (on the right). 



The diagonal line indicates the squares in which the length of the 

 ovipositor is equal to that of the caudal femur. 



From the table on page 413 the relative measurements of 

 the ovipositor and caudal femur of fasciatus and its geographic 

 races are shown to be of use as a character, though exceedingly 

 variable. Typical fasciatus has the ovipositor usually considerably 



25 These specimens are examples of the largest macropterous form of the present 

 species, from which form the type was unquestionably described as De Geer's 

 figure shows. 



26 These specimens are among the largest of the series of brachypterous 

 specimens which we have before us. 



" These are among the smallest of the series of specimens which we have before 

 us from the New England States. 



2s The specimens from Nova Scotia are typical of the species over the extreme 

 northeastern portion of its range. 



