118 GEO. H. HORN, M. D. 



Lairochirus. From the latter it especially differs in the thorax less 

 strongly angulate and not tuberculate, and by the antennae being 

 very little longer than the body even in the male. The form 

 of the mesosternum also differs as well as the relative size of the 

 femora. 



In the female of the present genus the femora are less clavate- 

 and the thorax less transverse, and the angulation reduced to a 

 feeble tuberosity. 



C Palmeri Lee, Xew Speciea, 1873, p. 233. — Antennae black, each joint 

 annulate with cinereous at base. Thorax sparsely coarsely punctured, surface 

 irregularly clothed with very fine ochreous pubescence. Elytra about twice 

 as long as wide at base, punctures Tuoderately coarse, distant and irregular, 

 surface without costse or tubercles, piceous black with a large discal saddle- 

 shaped space of ochreous pubescence extending a little behind the middle, 

 behind which. are large irregular spots of similar pubescence. Body beneath 

 with extremely fine ochreous pubescence. Legs black with very fine black 

 pubescence, tibise with a cinereous band at middle. Length .70 9 — 1-00 % 

 inch ,• 18— 25mm. (PI. II, fig. 1). 



The elytral markings are described in sojuewhat different man- 

 ner by Dr. Leconte but the meaning is the same, the fact being 

 that the pattern is of the same type as in Lagochirus. In the 

 one female I have seen the markings are suffused and the pattern 

 indistinct. 



Three specimens, Arizona. 



Group II. — Liopi. 



From the Lagochiri this group differs in having the thorax angu- 

 late, 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, 

 (Classification p. 338), requires some modification by the omission of 

 Lophopoeum ? and Sternidius, and the introduction of 31ecotetartus, 

 (Eutessus Lee). 



The species placed provisionally in Lophopoeum seems rather a 

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

 thorax as strong as in P. crinitus. 



Sternidius is the equivalent of Liopus and those species formerly 

 under the latter name are added to Lepturges. 



Mecotetartus Bates, (Eutessus 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 this country. 



