Mr. O. Thomas on Three new African Muridae. 179 



joints of the tarsi, testaceous, piceous at apex ; tarsi black, 

 the joints paler at the base beneatii ; claws testaceous, much 

 curved. 



Wings elongate, acute at the apex, which is slightly falcate 

 in the posterior, about equal in length, hyaline ; neuration for 

 the most part black, finely interrupted with yellowish-white 

 on the subcosta and lower cubitus, and witii similar but 

 longer and fewer interruptions on the radius ; the costal ner- 

 \'ules mostly have a yellowish-white point in tlie middle (in 

 anterior), and there are scattered nervules of the same 

 colour over the disk of the wings ; pterostigma inconspicuous, 

 whitish yellow, with closely-placed thickish black nervules. 

 In the anterior wings nearly all the nervules (except in the 

 costal area) and the axillae of the marginal and submarginal 

 forks ar-e clouded with blackish, giving the wings a strongly 

 irrorated appearance ; these cloudings are congested into a 

 rather conspicuous spot at the termination of the branch 

 of the lower cubitus on the inner margin, and there is a 

 similar but smaller spot on the disk towards the apex on the 

 line of the cubiti. In the posterior wings the cloudings are 

 absent save on a few nervules round the apical j)ortion 

 and on the apical forks and those of the inner margin ; a 

 cubital spot on the disk before the apex as in anterior. 



Expanse of wings about 85 millim. ; greatest breadth of 

 anterior \\\ millim. 



Hah. Lanai. Mr. Wilson brought one example. 



The only species of Myrmeleonidte otherwise known to 

 exist in the Hawaiian Islands is Formicaleo perjuruSj Walker, 

 a very much smaller insect (expanse about 60 millim.), 

 without irrorated wings. Both, with other known species, 

 belong to the group of F. tetrayrammicus^ F., of Europe 

 and Asia. 



XIX. — Descriptions^ of Three new African Muridae. 

 By Oldfield Thomas. 



Mus {Dasymys) Bentleyie, sp. n. 



Closely allied to M. [D.) incomtus, Sund. *, of which a 

 good description with figures has beeii published by Peters 

 under the name of Dasyinys Gueinzii'f. Agreeing with that 



* (Efv. \'t't.-Ak. Fcirh. 1846, p. 120 (publ. 1847). Prof. Leclie lias 

 kindly given nie such iulVn-inatiou about the type of this species as has 

 coniiruied my supposition that D. (iueinzii was .synonymous with it 



t MJl. Ak. Ikil. 1875, p. U. 



