466 MR. W. F. KIRBY ON NEW OR RA.RE 



IscHNOPODA, Grandidier. 



I.tchnopoda, Grandidier, Rev. Zool. xxi. p. 292 (1869) ; Lucas, Ann. Soe. Ent. Fr. (4) ix. p. 430 (1870). 



The type of this genus is I. Beyl, Grandid., from the Zambesi. To the same genus 

 belong Bactrododema brevitarsls, Stal, from Damara-land, and a fine new species from 

 Tanganyika, which I describe below. The females vary considerably in comparative 

 length and. breadth of wing, but have always at least two strong diverging spines (not 

 symmetrical) about the middle of the mesothorax, and the boss on the tegmina is rather 

 long and pointed. The first joint only of the front tarsi is lobate. 



ISCHNOPOBA. EPISCOPALIS, sp. n. 



Female. Grey, varied with darker, a high double laminated crest, obtuse above, 



between the eyes ; head thickly tuberculate, the rest of the body coarsely granulated, and. 



striated, the rugse forming irregular stria? on the pro- and mesothorax ; two sharp spines, 



black at the tiji, standing obliquely outwards before the middle of the mesothorax ; 



segments 5 and 6 of the abdomen with a slight crest on each side before the extremity ; 



tegmina grey, rather long, with a high rounded elevation near tlie base, tipped with 



blackish ; wings with the costal area grey, indistinctly varied with darker, and broadly 



black at the base ; wings long and broad, black, with irregular yellowish hyaline bands, 



converging, anastomosing, and disappearing beyond the middle of the wing. Legs more 



or less banded with grey and In'ow^n ; front femora with three triangular elevations below 



and one about the middle, above ; front tibiae with two raised crests above, and first 



joint of front tarsi laminated ; the first and fifth joints (without the claws) are of about 



equal length, and longer than joints 2-4 together. Antennae a little longer than the front 



femora. Middle femora with large triangular elevations near the base, one pair below, 



and a single one, just beyond it, above ; before the extremity is a pair of smaller teeth on 



the carinse beneath. Middle libiae with two crests above; first joint of middle tarsi as 



long as the three following. Hind femora curved, toothed beneath at the extremity, 



and very slightly so above ; hind tibiae with from two to four triangular teeth above, 



and sometimes a small one towards the base below ; first joint of hind tarsi rather longer 



than the three following together. • 



Dbnensions. 



Long, corporis 215 millim. 



„ capitis 11 ,, 



,, pronoti 11 ,, 



„ niesonoti 3G „ 



„ tcgminuni 25 „ 



Exp. al ] 70 „ 



Loug. femorum anticorum 5;i „ 



„ ,, niedianonun 'M) ,, 



„ ,, jjosticoruni iG „ 



Mab. Tanganyika. 



This fine species is closely allied to /. Beyl, Grandidier, as figured by Brongniart, but 

 is rather smaller, and the wings are much larger; it is probably quite distinct. There 

 are two female specimens in the collection of the Museum. 



