new Species of African Diploptera. 455 



longer than broad, truncate at apex, somewhat convex. 

 Head massive, as broad as thorax at its widest, postorbits 

 swollen; seutellum and ])ostseutellum ratlier prominent, 

 postseiitellum blnntly bih>be(i ; median segment medially 

 depressed, each side forming a ridge terminating in an in- 

 conspieuons angle. Abdomen with segment 1 rather 

 narrower than segment 2; sternite 7 armed with a series of 

 short spines. 



Clyi)eus and mandibles minutely, abdomen sparsely, head 

 and thorax coarsely punctured. 



The whole clotlietl with a more or less dense covering of 

 black pubescence, thickest on the ventral surface of the 

 abdomen ; legs with goldeu pubescence. 



Length 2.2 mm. 



Hah. Lufira River, Katanga (3500 ft.), 1st September, 

 1907; 150-200 miles W. of Kumbove (3500-4500 ft.); 

 N.E. Rhodesia, Fort Jameson (3800 ft.), 3rd-6th June, 

 1910 {S. A. Neave) : Fwambo, Tangan Nyassa Plateau, 

 Tanganyika [W. H. Nult). 



? . Simihir to the male, but the mandibles shorter (5 mm.) 

 and with clypcus bluntly pointed, not truncate at apex. 



This conspicuous species comes into Saussure's Division I., 

 which includes those species with straight mandibles and 

 3-jointcd labial and maxillary palpi. The colour-markings 

 are constant in all the nine s[)ecimens available for exami- 

 nation. The only male in the series besides the type 

 specimen lias the protuberance at the base ol: the mandibles 

 only slightly developed. 



MoNTEZUMiA, Sauss. 

 Montezumia bimaculata, sp. n. 



Niger, nitidus; segmento secundo abdominis utriuque flavo- 

 maculato ; alis fusco-cajruleis. 



? . Shining black ; a small ovate spot on apical margin 

 of tergite 2 on each side, pale yellow. 



Mandibles, scape, underside of flagellnm for the most part, 

 a line behind the eyes, apex of anterior femora, anterior 

 tibise and tarsi totally, intermediate tibiae above, and inter- 

 mediate and posterior ealcaria, ferruginous. 



Wings dark brown-violaceous, the hind wings apically 

 hyaline. Anterior tibiie and tarsi densely, and intermediate 

 tibiae and tarsi more sparingly clothed with golden pubes- 

 cence. Surface of truncation of median segment clothed 

 with dense silver-grey pubescence, a small ovate patch of 

 dense, short, brown pubescence on abdominal sternite 2. 



