Malacodtrn Genera Prionocerus anrf IJgia. 331 



2. Idyia dimidiata. 



Pn'onocorHS dimidiatus, Uerst. Arch, fiir Naturf?. xxxvii. p. 56 (1871) ' ; 

 \()n tier Decken's Keisu in ( Kst-Afrika, iii. 2, p. 158, t. 8. fiir. 11 

 (1873)*. 



Elongate, depressed, slightly widened posteriorly ; thickly 

 pubescent, the elvtra also with scattered, long, seriately 

 arranged, erect hlack set:e, the head and prothorax witii 

 numerous curled black bristly hairs, those beliind the eyes 

 projecting laterally ; black, the prothorax and seutellum, 

 and the elytra witb from one-fourth to nearly one-half 

 their length, fulvous or luteous, the apical patch often with 

 a bluish or violaceous lustre. Head polished, with a few 

 small scattered punctures, the labruui large, transverse, 

 angularly dilated laterally; eyes very large in (^ ^ a. little 

 smaller in ? , well separated in both sexes ; antennae 

 moderately long in ^ , shorter in $ , joints 3-11 longer than 

 broad, widened, subserrate, 7-10 decreasing in length, 

 11 much longer than 10, concave on its inner face. Pro- 

 thorax as lon<r as broad, sparsely punctured. Elytra long, 

 densely granulato-punetate, the seriately arranged setigerous 

 impressions each preceded by a minute tubercle, the apices 

 obtuse, in some specimens angulate at the sutural angle. 



(J. Anterior tarsal joints 1-3 with a comb along their 

 inner edge, 1 simple, scarcely longer than 2, 4 small, shorter 

 and narrower than 3 ; joint 1 of intermediate and posterior 

 tarsi 8imi)le, slightly longer than 2; posterior tibiic feebly 

 curved. Geidtal armature (Fl. XI. fig. 4.) : lateral lobes long, 

 broad, rounded or obtuse at tip ; median lobe gradually 

 narrowed, drawn out into a very long, slender, curved, 

 somcNvhat sinuate point at apex. 



Length (excl. head) 9^-13^, breadth 3^-5 mm. (cf ? .) 

 JJab. Abyssinia, Higo Samula (R. J. Sturdy) ; E. Africa, 

 ]\Iombasa' [tyjie], Masongaleni (alt. 3000 ft.), Kibwezi 

 (alt. 3000 ft.), M gori Valley in S. Kavirondo (alt. 4200 ft.), 

 Aitito Andei (alt. 2500 ft.), Makindu (alt. 3300 ft.), Voi 

 (alt. 1800 ft.), Usangu district ('alt. 3500-4500 ft.) {S. A. 

 Neave), Lulanguru (G. D. U. Carpeuter), Samburu (C. S. 

 Betton) ; Nyasalani), Masai (Mus. Brit.), Mombera district 

 (alt. 4000 ft.), Lilongwe di.-trict in Central Angoniland 

 (alt. 4000-5000 ft.) (S. A. Neave) • N.E. Rhodesia, on 

 road Fort Jameson-Lundazi (alt. 4000 ft.). Upper Luangwa 

 River {S. A. Neave) ; Mashonaland, Salisbury ( G. A. A'. 

 Marshall); Zululand (Mus. Brit.); Natal [Mus. Brit.), 

 Greytown (H. B. Marie]/), Estcourt (G. A. K. Marshall), 

 Port Natal [Boheman") ; ? S. Africa, Cape of (Jood Hope 

 (Mus. Brit.). 



