ClCINDELID^E AND CARABID.E 13 



in my cabinet, regarding it simply as a green specimen of sperata, 

 but on closer observation it is seen to have a broader form and the 

 external angulation of the female elytra is much more obtuse than 

 in s per at a. 



The mandibles in Cicindela are seldom observable throughout 

 their length when attached to the head, but where they are fully 

 exposed to view they may be seen to be remarkable in dentition. 

 The right mandible has the usual three teeth near the middle of its 

 length, the middle one sometimes very much smaller than the 

 others, but there is another very prominent tooth at the base which 

 is not single, but double, the two teeth generally being of the same 

 prominence and placed side by side on a transverse line of the inner 

 edge of the mandible; the opposite tooth of the left mandible is 

 also duplex but not so strongly, and when the mandibles are closed 

 fits into the corresponding tooth of the right mandible, thus securely 

 locking them. I am unable at present to state how constant this 

 formation may be throughout the genus, but it is analogous in all 

 that I have been able to examine, and the basal paired tooth of the 

 right mandible becomes very prominent in the limbata group as 

 well as in ponderosa. 



26 Punctulata group. 



We begin here a rather abrupt departure from any of the pre- 

 ceding groups and again have to deal with subglabrous forms; they 

 however differ from the earlier groups of the genus in having the 

 subsutural line of foveae better developed and include nearly all 

 those forms having a rufous abdomen. The punctulata type is so 

 well known as to need no present comment, further than to say that 

 the abdomen, as in the two following groups, is not rufous but 

 black and metallic as usual. This group comprises punctulata 

 Oliv. (micans Fabr.), chihuahua Bates (micans Shpp., Leng nee 

 Fabr.) and boulderensis Csy. 



27 Sever a group. 



The body is larger in this type than in the preceding and gigantic 

 when compared with the following group, smooth, subglabrous, 

 sometimes with sericeous lustre, with large head and very prominent 

 eyes. The only two known species are severa Laf. and striga Lee. 



