55 



obconical ; pedicel nearly spherical ; third and fourth joints conical ; fifth 

 and sixth nearly top-shaped ; seventh pateriform ; the three last forming a 

 short ovate knob. 



[130.] Body between oblong and ovate, not hairy. Head inserted, 

 subtriangular with the vertex of the triangle truncated ; rhinarium trans- 

 verse, vertical, widely emarginate ; nose transverse, distinct, anterior mar- 

 gin reflexed and subemarginate ; no distinct postnasus or aftcrnose ; can- 

 thus septiform, cleaving : prothorax transverse with an anterior sinus of its 

 whole width to receive the head : scutellum short, triangular, somewhat 

 rounded at the vertex : podex and part of the penultimate dorsal segment 

 of the abdomen uncorered : legs thus located ; ; ; cubit tridentate ; tarsi 

 filiform, slender ; claws bipartite, the interior lobe the shortest and widest, 

 and very obtuse ; the exterior very slender and acu^e. 



179. DiPLOTAXis TRiSTis Kirby. — Plate v., fig. 3. — Length of body 

 5 — S/'^ lines. Several specimens taken in Lat. 54". Taken also in Nova 

 Scotia by Capt. Hall. 



[131,] Body dark chestnut, more or less grossly punctured above and 

 below^ Head thickly punctured with a pair of impressions between the 

 eyes ; nose subemarginate ; antennae and palpi rufous : prothorax thickly 

 punctured, slightly impressed at the four angles : scutellum impunctured : 

 elytra rather paler than the head and prothorax, with nine rows of punc- 

 tures, viz., a single one at the suture, four arranged in pairs at the disk, 

 and four in the sides ; the interstices between the rows are also irregularly 

 punctured ; the four posterior tarsi, especially the intermediate pair, are 

 longer than the tibiae. 



Obs. In more recently disclosed specimens the body is often entirely 

 pale - chestnut and sometimes rufous. [Common throughout Ontario. 

 *' Middle States and Lake Superior, not rare." Le ConU.^ 



[132.] 180. Rhizotrogus fervens Gyii. — Two specimens taken in 

 I^t. 54°; a variety in Canada by Dr. Bigsby. [Synonymous with Lack- 

 nosterna fusca Frohl ; the common May Beetle, or Cockchafer, of Canada. 

 " A very common and, through Atlantic America, widely extended species, 

 embracing several races, to which, however, no definite characters can be 

 given." (Le Conte). For description and figure see Harris's Injurious 

 Insects, page 30.] 



[133. J 181. Rhizotrogus Drakii A7r^>'. — Length of the body 9^ 

 to 1 1 ^ lines. A single specimen taken in the journey from New York to 

 Cumberland-house. Varieties B and C, by Mr. Drake in Massachusetts. 



This species is extremely similar to the last, it differs principally in 

 ha\ ing the sides of the scutellum more thickly punctured, the ridges of the 



