DYTISCID/E. 77 



(112) 1. * Dytiscus (Leionotus) Franklinii. Franklins D. Leionotus. 



D. L ( Franldinii ) oblongo-ovatus, nitidissimus ; s'ubtus nigricans, svpra nigro-olivacevs ,■ ore, thoracis limbo, elytrisque latere, 



jiavicantibus : hisjuxta suturam seriatim obsoletissime granulatis ; metasterno lobis acutis divei'gentibus. 

 Franklin's D. Leionotus, oblong-ovate, very glossy ; dusky underneath, above dark-olive ; mouth, margin of the prothoiax, 

 and side of the elytra, yellowish ; elytra near the suture with some very obsolete rows of granules ; lobes of the 

 metasternum sharp, diverging. 



PLATE II, FIG. 1. 



Length of the body 1 inch and 4 lines. 



A pair taken in Lat. 65°. 



DESCRIPTION. 

 C? 



Body oblong-ovate, glossy as if covered with varnish ; underneath black spotted and banded with 

 pale chestnut; above dark olive, in certain lights of a beautiful olive-green. Head with a very few 

 minute, scarcely discernible, punctures ; antennas chestnut ; mandibles and palpi black ; nose, upper- 

 lip, margins of the prothorax, and side of the elytra, dusky yellow : prothorax distinctly channelled, 

 surrounded within the margin with an irregular series of punctures, interrupted at all the angles, 

 and in the middle anteriorly and posteriorly : elytra sculptured as in the two preceding species, 

 except that there are several very obsolete rows of flat granules scarcely discernible between the 

 suture and the first row of punctures ; and there is no yellow oblique band or gleam near the apex: 

 legs black, with the arms and intermediate thighs dusky or dusky lurid ; the lobes of the metas- 

 ternum very acute, more than usually diverging, incurved a little at the apex. 



? 



Head more visibly, though still very minutely, punctured : prothorax minutely punctured : elytra 

 more coarsely punctured at the apex : legs dusky lurid, posterior tibia? darker, tarsi black ; scapulars, 

 and parapleural grossly punctured ; angle of the mesostethium wrinkled ; posterior coxae lightly, but 

 not thickly, punctured ; lobes of the metasternum very acute, not incurved at the apex. 



This species a good deal resembles L). L. conformis, but it is larger, the legs are darker, the 

 elytra do not exhibit traces of three or four obsolete flat ridges, but in the interstices between the 

 suture, and the first and second rows of punctures, are several rows of obsolete, very minute, flat 

 granules or tubercles not easily discernible except under a strong magnifier : the lobes also of the 

 metasternum diverge more than in the species alluded to. 



