49 



antennae. Its tarsi have five very distinct joints and the penul- 

 timate is deeply bifid. It is marked 874. [874, Hentz mss. 

 Cat. = Priocera undulata Say.] I do 

 not know whether you can make out 

 anything by these wretched scratch- 

 ings of my pen ; but if you can, I 

 would like to have your opinion, for ^„ g 



neither answers the description of 



Priocera, and yet neither can be referred to any genus that I 

 know. 



HARRIS TO HENTZ. 



Milton, January 16, 1829. 



Your 874 has the number of tarsal joints, the palpi, and form 

 of TiUus, as defined by Latreille and Leach, and the antennae do 

 not greatly differ. Those of TiHu.s are stated to be " subfili- 

 form," although they are also somewhat serrate towards the 

 ends, but probably not more so than in many Platers. For the 

 present, then. No. 874 may be considered as a Tillus. You 

 mention a genus by the name of Cylidrus. By whom was it 

 established, and where is it defined ? 



Your TafliekeruB, No. 133, figured in the letter, agrees in 

 many respects with mine (No. 1) found in Milton, and lately 

 received from New Hampshire. The thorax is not grooved in 

 my insect, but has an oblong indentation on the posterior half 

 of the disk, and the male has two smaller round ones in front 

 of it. 



Your insect measures -}r in. lono;er than mine, and the 



15 & ■ 



thorax does not seem to l)e quite so broad before the nn'ddle. 

 In mine the scales are not white nor so regularly disposed as 

 in yours ; but this may arise from the effects of time and rough 

 usage. The troplii of 740 apparently resemble those of Morio 



OCCAS. PAPEKS, B. S. N. H. — I. 4 



