92 Mr. A. Murray on Coleoptera from Old Calabar. 

 tennse, for example, have the terminal article of a pale yellow. 



Fig.l. 



Tier, 2. 



=: 



^'^^^ 



The thorax, beside the ridge and groove, 

 has four diverging minor ridges radia- 

 ting from the middle ridge (fig. 1) ; and 

 the reticulations of the elytra between 

 each ridge are singly scalariform, as shown 

 in fig. 2, and not doubly scalariform as 

 in the next species. 



2. Metriorhynchus semiflahellatufi. Fig. 3. 

 Lycm semiflabellatus^ Thorns. Arcli. Ent. ii. p. 79. 



Mr. Thomson's description of what Fig. 3. 



I suppose to be this is as follows : — 



" Above yellow, with the middle of 

 the prothorax, the scutellum, and a little 

 more than the posterior third of the 

 elytra black ; below, legs and antennae 

 black, as well as the base of the thighs, 

 the middle of the metasternum and the 

 last article of the antennae yellow. 



" Very elongated, slender, parallel. Antennae very broad, 

 with prolonged articles diminishing towards the extremity ; 

 prothorax angularly rounded in front, in the middle a ridge 

 changing behind into a broad groove. Elytra straight on the 

 sides, having each three strong ridges ; intervals reticulated. 



" Length 7| mill, breadth 2 mill." 



The only difference between this and the description of the 

 preceding species is that, while the elytra of L. sulcicolUs have 

 four strong ridges with the intervals " regularly reticulated," 

 this has only three strong ridges with the inter- pj^. 4 

 vals ^' reticulated," and that the scutellum of this 

 species is black, while that of the other is not. 

 The difference in reticulation is not alluded to ; 

 but the reader will see, on comparing fig. 4, which 

 shows it in this species, with fig. 2 in the last, 

 that it is an excellent distinction. 



I am in doubt whether any difference is meant to be implied 

 by the use of the different expressions "reticulated" and 

 " regularly reticulated ;" but the single scalariform interval 

 appears more suggestive of regularity than the smaller and 

 closer double scalariform interval, which is necessarily more 

 crowded; and on that ground I have referred the "regularly 

 reticulated " to X. sulcicolUs ; and I am the more supported in 

 doing so by the scutellum (or, rather, the scutellar region) 

 being black in it. The numerical difference of three strong 

 ridges instead of four I cannot find : they all have four ; and 



