ClCINDELID/E AND CARABID^ 173 



Philophuga Mots. 



This genus is said by G. H. Horn to be closely allied to Calleida, 

 differing only by the fourth tarsal joint being emarginate and not 

 bilobed; but others, and among them Chaudoir and Bates, regard 

 the two genera as being much less closely related in fact assignable 

 to different groups. The difference in form of the fourth tarsal 

 joint is certainly a very important and radical character, but I 

 have not given the "Troncatipennes" sufficient general study to 

 warrant any decided opinion at this time. The tarsal claws are 

 strongly pectinate as in Cymindis and Calleida. Our species, 

 omitting castanea Horn, which can be recognized readily by its 

 marked difference in color, being castaneous and not blue or green 

 as is always the case in the others, may be identified by the following 

 short comparative diagnoses: 



Elytra more elongate, never less than a third to two-fifths longer than 

 wide and only feebly or moderately narrowed basally 2 



Elytra shorter, a fourth longer than wide or but slightly more and more 

 narrowed basally, the body smaller in size 5 



2 Prothorax distinctly wider than long, the elytral striae deep, the 

 intervals convex. Blue-green in color, shining and metallic in 

 lustre, the antennae black, the first three joints each with a small 

 ferruginous spot beneath; head feebly rugose and punctate at the 

 sides, the frontal impressions broad, short and oblique; prothorax 

 wider than long, convex, subcordate, the sides rounded, the base 

 retracted; lateral margin finely reflexed, broader posteriorly, the 

 hind angles feebly elevated, obtuse; base obliquely truncate at the 

 sides; surface with the transverse impressions and median stria deep, 

 transversely rugulose, obsoletely on the disk, the base punctate and 

 with a few punctures anteriorly; elytra subconvex, subparallel, the 

 humeri rounded, the apices rectilinearly truncate, the striae deep, 

 punctate, the intervals convex and with small sparse punctures; legs 

 black. Length 9.4 mm.; width 4.6 mm. Colorado (near Long's 

 Peak), [horni Chd.] amcena Lee. 



Prothorax about as long as wide, the elytral striae fine or shallow, the 

 intervals flat 3 



3 Sides of the prothorax strongly sinuate posteriorly, becoming nearly 

 parallel and straight toward the angles, which are but little more than 

 right and bluntly rounded. Body smaller than usual in this section, 

 pure deep blue in color throughout and only moderately shining 

 above, greenish-blue and metallic beneath, the legs black; head 

 slightly narrower than the prothorax, not strongly, sparsely punc- 

 tate, impunctate medially, the antennae black, the three basal joints 

 pale, the first black along its entire upper surface, the second and 

 third with an apical black spot above; prothorax slightly wider than 

 long, the sides rounded, converging and sinuate posteriorly, the 



