284 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io4 



in the St. Augustine specimens, and the lateral margins of the prono- 

 tum, which are not as evenly arcuate as are the margins of the Welaka 

 specimens. 



The range of duhius probably extends along the northeastern coastal 

 area of Florida. 



So far, nothing has indicated that the habits of duhius vary in any 

 way from those of the preceding species. The "at light" label on one 

 specimen is interesting, but ordinarily light does not appear to be a 

 good attractant. 



Pcltotrupes youngi, new species 



Adult biology by Young (1950, pp. 88-92), as chalybaeus LeConte. 



Description of larva by Howden (1952, pp. 41-48), as profundus 

 Howden. 



Holotype: Male. Length 17.5 mm., greatest width 12 mm. 



Color of dorsum dark reddish brown to black, suffused with pro- 

 nounced iridescent green, only occasional slight traces of blue or purple. 

 Iridescence is general but most pronounced on head, margins of thorax 

 and elytra, and along elytral striae. Ventral sm-faces are very dark 

 brown to black, thorax slightly darker than abdomen. Femora and 

 epipleura blackish with traces of iridescence. Head with broadly 

 rounded clypeus forming a rather sharp obtuse angle with eye canthus 

 (pi. 2, fig. la). Both clypeus and anterior portion of canthus are 

 margined. Clypeus coarsely, moderately, irregularly punctate, except 

 on posterior tubercle. Vertex of head with a very few coarse punc- 

 tures between the eyes. Pronotum sharply and completely margined. 

 Anterior angle sharply rounded, slightly obtuse (pi. 2, fig. 2a). Pos- 

 terior edge of the anterior margin slightly curved posteriorly. Double 

 row of coarse punctures noted in profundus lacking at midline (pi. 2, 

 fig. 3a). A few coarse, moderately deep punctures are unevenly 

 scattered over lateral portions of pronotum, very slightly more nu- 

 merous posteriorly. The deep, circular, coarsel}^ punctm'ed indenta- 

 tion noted on each side near the middle of the pronotum of profundus 

 is almost obsolete. The fine secondary punctures (less pronounced 

 than is usual in profundus) are generally evident only laterally. 



Elytra with striae obsolete, first stria vaguely indented, but not in 

 the basal millimeter, where the stria is indicated only by a few small 

 punctures. All the other striae are indicated only by rows of shal- 

 low punctures. Punctures generally about half the depth of those of 

 profundus. Very small punctures indicating fifth stria forming a 

 slightly UTCgular row anteriorly. Some of the second to sixth elytral 

 intervals in places slightly concave, with their highest points next to 

 the punctures. Elytral margin expanded, explanate, anteriorly less 

 so than in profundus. Angle between normal convexity of elytron 



