6(56 Descriptive List of 



riorly before the apex of the elytra, to the ridge succeeds a deep punctured 

 furrow, which does not reach either extremity of the elytron, then a second 

 ridge extending from the base to near the apex, then a second furrow, in- 

 distinctly punctured, extends from the base to the apical angle, where it 

 unites with the first, then another less elevated ridge, a broad but shallow 

 furrow slightly punctured, and a marginal ridge ; the protibice have an a- 

 cute tooth a little before the apex, curved forwards, and two long claw-like 

 teeth at the extremity, curved downwards. 



Inhabits South America. Five specimens were captured by- 

 Mr. Darwin at Rio, and have been lent to me for description. 



Sp. 5. Rhys, costatus. 



„ „ Guerin; « Iconographie du Regne Animal. In- 



secta.' Tab. xxvi. fig. 12. 



Inhabits Brazil, and is nearly related to, but apparently not 

 identical with, Rhys, liratus above described, which is a more 

 linear insect. 



Sp. 6. Rhys sculptilis. Piceo-rufus : caput sub-trigonum, angulis pos- 

 ticis rotundatum, vertice profunde sulcatum ; oculi fere invisi ; pro- 

 thorax medio longitudinater sulcatus, angulis posticis profunde fovea- 

 tus ; elytra sex-sulcata, sulcis obsolete punctatis. (Corp. long. .295 

 unc. lat. .05 unc.) 



The colour is pitchy red ; the head is somewhat triangular, with the pos- 

 terior margins rounded ; the vertical portion is divided by a deep furrow, 

 which reaches the extreme posterior margin, and divides anteriorly, passing 

 the base of each antenna, and thence proceeds to the region of the clypeus, 

 enclosing a raised diamond-shaped glabrous space ; the vertical portion of 

 the head consists of two oblong glabrous spaces, divided by the furrow al- 

 ready described ; the sides of the head are produced into two roundish gla- 

 brous spaces, in which are situated the eyes, distinguishable only under a 

 very high power, and probably scarcely available to the insect as organs of 

 vision : the form of the prothorax is a long square, the sides being very 

 slightly convex, and having a marginal ridge ; a deep longitudinal furrow 

 extends throughout the dorsal surface, this is slightly dilated posteriorly : 

 in each of the posterior angles is a deep punctured fovea, which is anterior- 

 ly attenuated, and attains nearly a third of the entire length of the protho- 

 rax : the elytra in the region of the scutellum are deeply impressed ; each 

 elytronhas six furrows, four dorsal and two lateral; the dorsal ones are ma- 

 nifestly but not deeply punctured, the lateral ones are rugose but scarcely 

 punctured ; the sutural region of each elytron does not slope to the suture: 

 the first and third interstices do not reach the apex of the elytra, the second 

 and fourth are still more abbreviated, the fifth extends round the extremi- 

 ties of the other four to the suture, but anteriorly this interstice does not 

 reach the base of the elytra : the protibice have a tooth just before their 

 apex curving forwards, and two teeth at the apex curved downwards ; these 

 teeth are more elongate and acute than in either of the preceding species. 



Inhabits the United States of America. One specimen in 

 the British Museum is from Wheeling ; two in the cabinet of 

 the Entomological Club from Mount Pleasant in Ohio, where 

 they were taken by Mr. Foster. ^ 



