l04 THE CANADIAN ENTOMOLOGlSl'. 



the diagnosis might be incorrect and induce the collector, were he am- 

 bitious in that direction, to add another synonym. 



It is true, Dr. LeConte mentions, in a two-line notice, that this is a 

 male form (Proc. Acad. Nat. Sci., 1862, p. 41) ; but, as the volume is not 

 indexed, unless stumbled on accidentally the reference would escape 

 notice. This appears to be a rare Cerambyan, and among the choicer. 

 The specimen taken here was of the last mentioned form, being in length 

 1.20 inch. Heretofore it seems to have occurred only in Ohio, (LeConte, 

 Dury). 



Leptura vihex Newm. A color variety of this caused me some 

 trouble, notice of which, if any, has escaped my attention. Dr. Horn 

 described the species under the name Jiitidicollis, giving a fine colored 

 figure (Proc. Acad. Nat. Sci., Phil., 1S60, p. 570 and plate 8). Normally 

 it is black, with the mouth parts and a narrow marginal and medium stripe 

 (subject to variation) yellowish ; legs rufous ; femora with the distal end 

 black, or not. This describes the form found here. The other form 

 previously alluded to corresponds also with this description, except that 

 the thorax is entirely yellow. I took it in Ohio, forty miles westward from 

 here, but did not find the other form there, so that perhaps it is a local 

 race. The species appears to be distributed from Northern Michigan 

 througli Canada and southward to Virginia. The variation in the extent 

 of the elytral stripes is considerable 3 in some individuals the marginal 

 one is obsolete and the dorsal reduced to a mere line 3 in others they are 

 dilated so as to leave only a narrow sutural and lateral stripe black ; and 

 some may possibly be found with tlie elytra entirely black, or entirely 

 yellow. 



Rhinoncus longulus Lee. is common and very abundant, occurring 

 from Florida to Michigan, and also in California (LeConte.) Here it 

 feeds exclusively on Polygonum virginicum Lin., a plant growing in open 

 woodlands, the leaves of which it perforates. Its season of greatest 

 abundance is late in June, but it may be found sparingly till September. 

 Though so common, it does not seem to be well recognized, no insect 

 being oftener given in exchange. This is probably because the descrip- 

 tion (Rhyncoph. N. A., p. 284) only applies to rubbed or alcoholic 

 specimens, omitting much of the vestiture as met with in life. In addition 

 to Dr. LeConte's description — " thinly clothed with small white scales ; 

 more dense, forming a sliort posterior-dorsal line on the prothorax, and 

 an elongate sutural spot at the base of the elytra" — there is also an elon- 



