300 PROCEEDINGS OF THE ACADEMY OF [May, 



Coloration of tegmina. 



a. Unicolorous, dark. 



b. Dark, intermediate channel pale. 



c. Dark, base and intermediate channel pale. 



d. Unicolorous, slightly pale. 



e. Slightly pale, intermediate channel very pale. 



f. Slightly pale, base and intermediate channel very pale. 



g. Unicolorous, very pale. 



Macropterism and hrachypterism. 



u. Tegmina large, wings fully developed organs of flight. 



V. Tegmina large, wings. much reduced and concealed by tegmina. 



w. Tegmina slightly reduced, wings as in v. 



X. Tegmina slightly reduced, wings very much reduced. 



y. Tegmina decidedly reduced, wings as in x. 



z. Tegmina greatly reduced, wings as in x. 



Size and form of insect. 



With these numbers signifies exceptionally robust form. 



1. Size very large. 



2. Size large. 



3. Size medium. 



4. Size small. 



5. Size very small. 



Much material is found not even to fit exactly any series of these 

 symbols. To overcome this difficulty a few qualifying remarks will 

 often be added or two instead of one of a set of symbols given. Thus 

 a specimen recorded as AB, or VX, or 12, shows it to illustrate a 

 condition intermediate between that signified by the two symbols 

 of a single set given. 



The most frequently encountered variants of Gryllus assimilis. 



We would again caution the student that these variants are in 

 no case fixed, all manner of intermingling is found in large series and 

 the use of names to designate such is not warranted, as such use 

 would on many occasions unquestionably result in conveying a 

 false impression to subsequent workers. 



C, greatly suffused Z, (normally a or b, u) 012. assimilis Fabricius. 



This variant is widely distributed throughout tropical humid 

 America at low elevations and throughout the West Indies. In the 

 United States it appears only along the coast of extreme southern 

 California. Though many series are quite uniform for this plastic 

 species, specimens before us from Duran, Ecuador, show to varying 



