66 The Scottish Naturalist. 



strong spine at the apex of the anterior tibiae, it will be referred 

 to the Geodephaga. 



The student will now turn to the " Table of families of Geode- 

 phaga" (p. 14), to ascertain to which of those families his specimen 

 belongs. Against the figure " 1 " on the left of the page, there 

 are three divisions characterised. The absence of a distinct 

 notch on the anterior tibiae will refer his specimen to the first 

 of these, against which " 2 * is set on the right. Referring to 

 " 2 " on the left, he will find the species composing that class 

 divided into two groups, distinguished by the length of the eye, 

 as compared with the length of the basal two joints of the 

 antennae together. The eye of the specimen in question being 

 shorter than the basal two joints of the antennae, it will be 

 referred to the Carabidce. 



Next, the table headed " Carabidce" (p. 16) must be referred to, 

 to determine what genus the specimen belongs to. Under the 

 figure "1" on the left of the page it will be referred (by the 

 form of the base of the thorax) to the figure " 2 " on the right. 

 Consequently the student will look where " 2 " occurs on the 

 left, and, observing that the elytra of his specimen are not 

 striated, he will decide that it belongs to the genus Cychrus. 



Finally, he will turn to the table headed " Cychrus" (p. 17), and, 

 finding that his specimen answers to the description of the single 

 species, he will decide that it is Cychrus rostratus. If the genus 

 contained more than one species, he would go through the 

 same process (to determine which species it belonged to) that 

 he had previously gone through to discover its group, its family, 

 and its genus. 



It is necessary, in concluding these remarks, to draw atten- 

 tion to the necessity of observing accurately the slightest point 

 mentioned, as any failure in doing so might lead the observer 

 far wrong indeed; and it may just be added that, after a little 

 practice, the collector will carry the characters in his mind 

 sufficiently to render it unnecessary for him, in most cases, 

 to do more than turn at once to the table of species in a 

 genus.] 



Calosoma. 



Blackish, E. shining, gr. , p. -85 , with smooth elev. ints. A row 



of puncs. on the 4th, 8th, and 12th ints. 12^ 1. E 8 - sycophanta 



