Bruner: Orthoptera from Africa. 93 



country, as prairies and even semi-deserts; or wherever there is 

 water, or damp ground to which they are partial. In looking for 

 these insects the collector succeeds best when he carefully examines 

 the margins of streams, low beaches, and open localities in swamps; 

 paths, roads, and other openings in forests and jungles; tree-trunks, 

 moss-covered rocks, fallen leaves and other rubbish which covers the 

 ground. In such environment they lurk, protected by their dull 

 and imitative colors. Besides being protectively colored and having 

 great resemblances to fragments of dead vegetation, particles of bark, 

 earth, pebbles, and similar objects, they also show a tendency to feign 

 death or to quietly perch so as to avoid notice. Some forms even 

 crawl or dive beneath the surface of water and cling to submerged 

 sticks, stones, etc., where they remain for long intervals at a time. 



Under these conditions it usually happens that ordinary collectors of 

 insects when visiting a region overlook most of the Tettrigidae. Only 

 the specialist, or persons who are especially in quest of them, and who 

 knows their habits and haunts, are likely to take a fair percentage of 

 those species which the locality contains. 



A complete list of these insects known from Africa at present only 

 includes about seventy-five species. There would undoubtedly be 

 several times that number listed, if all were known. 



Fully one-half of these insects reported from Africa are recorded 

 from the region whence the collections now being reported upon came. 

 Notwithstanding this fact there are less than a dozen forms at hand. 



Genus Hippodes Karsch. 



Hippodes Karsch, Ent. Nachr., XVI, p. 24, pi. 17 (1890); Hancock, Genera Ins., 

 Fasc. 48, pp. 17-24, fig. 7 (1908). 



This genus was established for the reception of a wingless grouse- 

 locust coming from West Africa. The present collection contains 

 another apparently closely related, but smaller species, which is 

 here described. 



I. Hippodes hopei sp. nov. 



Of medium size, moderately robust, without tegmina and wings, 

 and with the apex of the pronotum reaching only one-half the distance 

 to the tip of the ovipositor and to the middle of the hind femora. 



Body somewhat depressed, the pronotum robust, somewhat tectate 

 and arched on its anterior half, the median carina prominent through- 



