4/8 



ON THE COLEOPTERA. OF SOCOTRA. 



[Apr. 5. 



posteriorly, where they are more convex, declivous at the apex ; each 

 elytron has eight rather strongly impressed, finely and closely punc- 

 tured stria;, the fourth and fifth much shorter than the others, and 

 united posteriorly ; the interstices are slightly convex, opaque, finely 

 and rather thickly punctured. 



12. PlAZOMIAS VERMICULOSUS, n. Sp. 



Nigro-fuscus, squamis ffriseo-sabulosis dense vestifusj rostro iri- 

 sulcato; thorace vermiculoso, lateribus bene rotundatis, basi 

 marginata; elytris fortitev striatis. 



Long. 6-/5 lin. 



This species has much the form and general appearance of Herpy- 

 stichns eremita. Rostrum nearly parallel, flattened above, longitudi- 

 nally rugulose ; with a fine impressed median line reaching nearly to 

 the vertex ; and on each side there is a longitudinal impression. The 

 eves are moderately prominent, rather less than a semicircle viewed 

 from above. Thorax a trifle broader than long, truncate in front 

 and behind, moderately rounded at the sides, broadest rather behind 

 the middle, slightly depressed on the disk, with a well-marked 

 median channel which does not reach the front margin ; all the 

 surface (except the anterior border) vermiculose, and divided into 

 rather irregular round areas, which have generally one puncture 

 about the middle ; the disk is covered with pale scales ; and there 

 are some very pale scales at the sides ; the base is margined. Scu- 

 tellum very small, shining black. Elytra at the margined base a 

 very little wider than the base of the thorax, but immediately 

 becoming wider (without, however, making any distinct shoulders), 

 oblong-ovate, convex, sloping down and somewhat acuminate at the 

 apex, strongly striated, the striae strongly but not closely punctured ; 

 the interstices almost flat, covered with sandy grey scales, with 

 small dots of a paler colour at intervals on the strise ; the scales on 

 the margins of the elytra and on a spot on the hinder femora are 

 also paler. Tarsi grey. 



Mallodon ARABicus. (Plate XLIII. fig. 7.) 

 Mallodon arabicus, Buquet, Rev. Zool. 1843, p. 330 (?). 

 Two examples brought by Prof. Balfour appear to be referable 

 to this species ; they are, however, smaller than the size given for 

 the Arabian specimen, being only 22 lines in length ; and there are 

 one or two other points in the description that leave room for doubt. 

 The Socotran examples have the head densely and strongly rugose : 

 the thorax has the anterior angles very much advanced, but rounded 

 at their apex ; the sides are much flattened, so as to be below the 

 level of the disk, and, although opaque, the flattened parts are not 

 very rugosely sculptured. 



EXPLANATION OF PLATE XLIII. 



Fig.l 



Hisiero7norpkus plicatipcnnis, 

 473. 



2. Ojiatrum costiferum, p. 476. 



3. Adelostoma bicarinatnm,-pA75. 



Pig. 4. Apithesis obcsa, p. 477. 



6. Eusyntelia halfouri, p. 474. 

 6. glabra, p. 475. 



I 



Mallodon arabicus, p. 478. 



