THE CANADIAN KMTOMOLOGIbT. 399 



and trivittata. Spwia, Lee, is distinguished by the more gradually 

 narrowed elytra behind the middle, or more elongate-oval form, as men- 

 tioned by LeConte. In the typical form, from Oregon and Washington 

 State, the spot on the callus is always isolated and rounded, though the 

 three posterior spots may be joined together to form a design resembling 

 that o'i parenthesis^ and the scutellar dash is always short, terminating 

 abruptly near basal fourth, though frequendy notably expanded at tip ; 

 Americana, of Crotch, is a subspecies occurring in New Mexico, having 

 a greatly extended scutellar spot and the subhumeral and median spots 

 frequently united, and, from Washington State and Utah, I have an inter- 

 mediate form with scutellar spot extending about to the middle or a little 

 beyond. In Crotchi the body is more oblong, the elytra more rapidly 

 narrowed and rounded apicaily, and, in typical forms, the subhumeral spot 

 is always joined to the medial by a subparallel black vitta ; the scutellar 

 spot attains basal third and is always more or less broadly rhomboidal, 

 the conformation bemg as in the subspecies complex, oi spuria. The side 

 margins of the elytra are extremely finely reflexed, and not with a distinct 

 gutter as in spuria and its variations. In siniiaia there is a discal vitta 

 on each elytron, which is almost semicircularly curved apicaily, and in 

 trivittata, which is a much smaller species,, the vitta is almost straight 

 throughout, becoming but feebly oblique apicaily. Falcigera, of Crotch, 

 because of the black met-episterna and lack of discal thoracic spots, 

 always so well developed in simiata and allied species, must be considered 

 as a section by itself. I am disposed to hold that the coarse-print para- 

 graph under Americana, in Crotch's paper, was really misplaced by the 

 printer in making up the page, and should have followed the preceding 

 falcigera, because the met-epimera in Americana are undoubtedly pale, 

 as in the other species. 



Finally, in regard to \.\\q parenthesis section, there can belittle or no 

 reasonable doubt \\\2C^ parenthesis and apicaiis are distinct species. In 

 the former there is never any tendency in the circular spot on the callus 

 to prolong itself posteriorly, and the subapical spot never attains the 

 sutural angle, while in the latter there is a marked tendency in the sub- 

 humeral spot to posterior elongation, and the subapical always attains the 

 sutural angle. I have never seen an exception to these laws in large 

 series, even where the eastern and western species come together on com- 

 mon territory in Colorado, and have never seen anything that appeared to 

 be a hybrid, although hybrids between distinct species frequently do 

 occur, so that this would not be conclusive evidence. As for the excep- 

 tional form figured by Leng, having the humeral spot connected with the 



