No. XIL—NEUROPTERA, MYRMELEONIDA FROM THE INDIAN OCEAN. 
By James G. NEEDHAM. 
(CommunicateD By Pror. J. Sranney Garpiner, M.A., F.R.S., F.LS.) 
(Text-Figures 1—3.) 
Read 5th June, 1913. 
Four species of antlions, collected in the Seychelles and other islands of the south- 
western part of the Indian Ocean by the Percy Sladen Trust Expedition, were sent to me 
by Mr Hugh Scott for study, and are here reported upon. One of the species is the well- 
known Myrmeleon obscurus Rambur which is widely spread in that part of the world. 
Rambur and Walker reported it from Mauritius, and in the present collection it is 
represented by specimens from nearly all the islands that were visited. A new species 
of Formicaleo, belonging to the subgenus Distoleon, is represented by a single specimen 
from Mahé, Seychelles Islands. The other two species, singularly enough, were collected 
only from the coral atoll of Aldabra. One of these, a fine Acanthaclisis, 1s new to science. 
The list, with localities and other data, together with descriptions of the new species 
follows. 
1. Myrmeleon obscurus, Rambur (Fig. 1). 
Myrmeleon obscurus Rambur, Hist. Nat. Ins. Neur., 1842, p. 403; Walker, Cat. 
Neur., Part Il, 1853, p. 370. 
. Deane ae 
: CLL. ke SS j 
be | oe ioral 4 ES = 
& s : i H = LES Le 3 SS SS 



Fig. 1. Myrmeleon obscurus Rambur, wings. 
This species is represented by fifteen specimens from a number of different islands. 
Length to wing tips 27 mm., expanse of wings 50 mm. The specimens agree well with 
Walker’s description, which is ample for recognition. 
