422 Mr. E. E. Turner on Fossion'aJ fIijin''nopfera. 



Tliis species is easily distinguished by the extraordinar}'' 

 structure of the mandibles^ clypcus, face, and anterior coxfe. 

 These characters are present in l)oth sexes, the male only 

 differing in the lesser breadth of the cheeks. The neuratiou 

 does not differ appreciably from that of other species of the 

 genus. 



Gastrosericus siherlocki, sp. n. 



5 . Nigra, argenteo-pilosa ; mandibulis fusco-ferrugineis ; tibiis 

 extus tegulisque pallide flavis ; callis humeralibus flavo-mar- 

 ginatis ; tarsis bninueis ; coxis anticis apice spina setif'orme 

 armatis ; clypeo apice latissime rotundato ; alis hyalinis, venis 

 fusco-ferrugineis. 



Long. 8 mm. 



$ . Eyes strongly divergent towards the clypeus, sepa- 

 rated on the vertex by a distance not exceeding the length 

 of the two basal joints of the flagellum, and not separated 

 from the posterior margin of the head ; the cheeks narrow, 

 less than half as broad as the eyes. Second joint of the 

 flagellum a little less than half as long again as the third. 

 Front with a narrow longitudinal furrow reaching the an- 

 terior ocellus. Thorax very closely and distinctly punctured ; 

 median segment very fairly rugulose, half as Avide at the 

 apex as at the base, with a carina from the base not reaching 

 the apex, the posterior truncation with a median sulcus. 

 Abdominal segments with broad apical bands of silver pile 

 which extend along the sides of the segments to the base. 

 Pygidial area shining, without punctures, narrow, fully twice 

 as long as the breadth at the base and almost pointed at the 

 apex. The recurrent nervures unite just before the junction 

 with the cubitus : second abscissa of the radius slightly 

 variable in length, but never less than half as long as the 

 first. Basal joint of fore ttirsi with five long and slender 

 s))ines. Abdominal segments brown at the apex beneath the 

 pile. 



Hah. N. Hhodesia, l^akasa (Si I ve)- lock) ; Vp\)er Luangwa 

 liiver ; Niamadzi River {Neave). 



This differs from lamellatus and copensis, Brauns^ in the 

 closer approximation of the eyes on the vertex, from lamel- 

 latus in the absence of the striking characteristics of the 

 hcnd and anterior coxa3, and from cope/isis in colour of the 

 abdomen. It also differs in colour from oraniensis, lirauns, 

 and karooensis, Brauns. In the descriptions of the last two 

 species there is no mention of the distance between the eyes 

 on the vertex, which 1 think Dr. Brauns would have nt)ticed 



