CERAMBYCIDAE. 323 



tarsus not quite as long as the next two. The aiitennye are not 

 filiate. 



Tlie above remarks, it may be needless to say, are applicable 

 to the genera of our fauna only. Tliese are known as follows: — 



Lateral spine of thorax very prominent, the disk tubeiculate, antf^nnai 

 much longer than the body. Lagocbinis. 



Lateral spine obtuse, disk not tuberculate, antennae not longer than tin- 

 body in either sex. Coenopoeus. 



In the males of both genera the sixth joint of the antennae is 

 prolonged inwards and with a brush of hairs in Lagocliirus, which 

 has also the anterior tarsi dilated and limbriate, and the same 

 tibia fimbriate within near the tip. 



Coenopoeus is founded on Leptodylus Palmeri Lee. 



Group II. — Liopi. 



From the Lagochiri this group differs in having the thorax 

 angulate, if at all, behind the middle and the tarsi slender. 



The lateral tubercle of the thorax, as observed by Dr. LeConte, 

 varies in position from sub-median to sub-basal. 



The table of the genera of this tribe, as defined by Dr. LeConte 

 In the first edition of this work, requires some modification by 

 the omission of Lophopoeum ? and Sternidius, and the introduc- 

 tion of MecotetarluA (Eutessus Lee). 



The species placed provisionally in Lophopaum seems rather a 

 Pogonocherus allied to P. oregonva, but with the lateral spine of 

 the thorax as strong as in P. criniluH. 



Sle7-nidius is the equivalent of Liopus, and those species for- 

 merly under the hitter name are added to Lepturges. 



Jleco/etartus Bates (Kutessus Lee), is added from the next 

 group, in which it had been doubtfully placed by Dr. LeConte, 

 he knowing the males only, while the description by Mr. Bates, 

 published but a few months before, had not yet reached tiiis 

 country. 



Decte.H is also added to the group as its characters do not 

 warrant a wider separation. 



The genera now known in our fauna are as follows: — 



Thorax feebly tuberculate or angulate at the sides a little behind the 

 middle ; mesosternum broad, first joint of hind tarsi not longer, if as 

 1 »ng, as the next two. Leptostylus. 



