250 Mr. C. O. Wateihouse on Coleoptera 



very closely punctured. Elytra reddish brown, with 

 cyaneous tint on the costse. 



Long. 14 mm. 



Uab. Nyassa [Thelwall). 



Very close to P. plagiata, Kerr., but narrower. Thorax 

 strongly and densely punctured, the punctures less close on 

 the disk. The lateral carina (viewed from the side) with an 

 arcuate sinus at the base, then continued straight to the 

 anterior sternal notch, rendered crenulate by the coarse 

 punctuation, and obliterated anteriorly. In P. playiata this 

 carina is bisinuate or undulating and is smooth. Elytra 

 uniform reddish brown, each with four strong costae, the first 

 of which extends to only half the length of the elytra. The 

 apex acutely denticulate. 



At first I thought this might be only a colour variety of 

 P. plagiata, but the lateral carina of the thorax is so different 

 that 1 think it must be a distinct species. 



Paracastalia Duvivieri, Kerr. 



The type specimen of this species has several very small 

 pale yellow spots on the elytra. In the British Museum 

 collection there are two specimens, one from Nyassa, the 

 other from Zambesi, which differ from the type in having 

 somewhat large orange-yellow spots, arranged thus : — a large 

 spot suri'ounding the humeral callus, one near the suture 

 before the middle, a very small one on the margin below the 

 shoulder, a quadrangular transverse spot about the middle, 

 an undulating fascia a short distance from the apex, and a 

 small spot at the apex. 



Neither of these specimens has the median line on the 

 throat so marked as in the type. They may be a distinct 

 species, but the material at disposal does not at present 

 justify their separation. 



Paracastalia Bettoni, sp. n. 



Elongate, parallel, dark bluish seneous. Elytra dull red, 

 each with nine or ten nearly equally raised convex costse, the 

 first of which extends only to the middle. 



Long. 14 mm. 



Hab. Samburu, Brit. E. Africa (C Steuart Betton). 



The species of this genus hitherto described are peculiar 

 for the fact that each elytron has four well-marked costse 

 separated by channels. The first and second channels unite 

 at the middle, behind the first costa, and from this point to 

 the apex there is a single costa. In P. Bettoni all these 



