340 CALAXDRIDJE. 



genus, the characters of which are set forth by Wollaston, Trans. Ent. Soc. 

 London, 1873, 480. It is easily recognized by the pale color, very small 

 size and narrow form. Southern States. 



CAULOPHILUS Woll. 



1. C. latinasus. Ehyncolus lat. Say, Cure. 30, eel. Lee. i, 299; Boh., Sen. 

 Cure, iv, 1068 ; Cossonus pinguis Horn, Pr. Am. Phil. Soc. 1873, 442. 



Southern States : the synonymy is on the authority of Dr. Horn, from 

 specimens in the collection of Mr. Chevrolat. The reference to the genus 

 is made after a careful study of the characters given by Wollaston, Ins. 

 Maderensia, 315, pi. vi, f. 4 ; Trans. Ent. Soc. London, series 2d, v, 368, 

 supplemented by the descriptions in the same work, 1873, 499 and 586. 

 Except that the punctuation of the prothorax is coarser in the figure than 

 in the three specimens in my collection, I should not venture to declare 

 them as a different species from C. sculpturatus. 



MESITES Sen. 



1. M. subcylindricus (Horn), Pr. Am. Phil. Soc. 1873, 441, (Cossonus'), 

 One $ found by me on the sea shore near Cape Henlopen, Delaware. 



This is the largest Cossonide known in our fauna, being 6.5 mm.; .26 



inch long. 



Tribe III. RHYNCOLINI. 



The genera of this tribe while differing from those of the Cotsonini only 

 >by having the prosternum very narrow between the coxse, and by having a 

 deep transverse gular groove beneath in front of the eyes, exhibit other 

 characters which show a strong approximation to the Bcolytida; thus the 

 number of joints in the funicle of the antennae varies so as to be barely of 

 generic value ; the beak becomes very much shortened, and the head 

 comparatively larger, as in Stenoscelis ; the form of the club varies, 

 becoming wedge shaped, truncate and spongy at tip in Wollastonia, thus 

 recalling the form seen in Ehynchophorus, &c. ; quite rounded or perhaps 

 a little transverse in Stenoscelis. The form is also that of certain Scolytida 1 . 

 Ehyncolus resembles closely one section of Hylastes, while Stenoscelis has 

 altogether the appearance of Hylurgops (II. rugipennis, &c.). 



As in the Rhynchophora, from the nearly perfect representation of past 

 and present forms, there are almost always intermediate genera to be 

 found, I would say that Phlaophagus seems to be one of such interme- 

 diates, and would be in place in the preceding tribe, if I did not regard the 

 approximate front coxge as having greater systematic value than the longer 

 beak and the weaker gular groove. 



The antennal grooves always commence near the tip of the beak and 

 descend obliquely below the eyes. 



Our genera may be separated as follows : 



