ClCINDELID/E AND CARABID^ 5 



2 Unipunctafa group. 



Consists of unipunctata Fabr. alone. Mr. Leng gives no record 

 of its flying and my material is too scanty to ascertain the develop- 

 ment of the wings; they are probably vestigial to some extent. 



3 Obsoleta group. 



Composed of obsoleta Say, vulturina and prasina Lee., and 

 santadarce Bates. The last is a good species, distinct from vulturina 

 in having the fascia very much less oblique and with the outer and 

 inner ends much more swollen; both of these are strong fliers but 

 prasina probably has less developed wings. The size throughout 

 is unusually large. 



4 Longilabris group. 



This group is well defined and consists of longilabris Say, montana 

 Lee., albilabris Kirby, perviridis and laurenti Schaupp., oslari and 

 vestalia Leng, nebraskana Csy., spinitarsis*, canadensis*, ostenta*, 

 and placerensis* . The allies of longilabris are numerous and the 

 group was less carefully elaborated by Mr. Leng than some others; 

 for example, it does not seem to have occurred to the author that 

 the formation of the labrum is different in the male and female. 

 In this group the tip is usually tridentate in the male, with the 

 lateral teeth broader and more obtuse and purely unidentate in 

 the female, though this rule by no means applies to the entire family; 

 here for instance it is more dentate in the male than in the female 

 as a rule, while in some other groups, such as rufiventris, it is the 

 female that has the more strongly dentate labrum. Nebraskana 

 is a subspecies of montana and has the labrum similarly black in the 



* 



female and white in the male; the body is however smaller and more 

 slender and the antennae less stout than in montana and it occurs at 

 lower elevations and more especially in the prairie country. The 

 coloration of the labrum appears to be important, but Mr. Leng 

 does not seem to have associated it with sex and implies that it is 

 therefore a very inconstant and unreliable character; more material 

 than I have at present would be desirable however in order to arrive 

 at a satisfactorily final conclusion. 



