( 463 ) 



E. ari'iKirea Becker. Otlier iiotowortliy dirterences, however, exist. Thus Becker 

 describes the first two joints of the antennae as "yellowish-brown," while he states 

 that the last two abdominal tergites are " entirely yellow " ; in the specimens before 

 the writer the first two joints of the antennae are clove-brown or black, at any rate 

 above, and the abdominal tergites in question, except their hind borders, are of the 

 same colour. 



It may be added that the typical specimen (a ? ) of E. arenacea Becker, which 

 is in the Mnsee Royal d'Histoire Naturelle de Belgique, in Brussels, was obtained 

 at Tilhs de Mela, in tlie Sahara, on 1. iv. 1893, by Professor Lameere. 



Genus MOLYBDAMOEBA Sack. 

 Molybdamoeba trinotata Duf. 



{Ann. Sac. Enl. France, 2"" Serie, T. x. p. 7, PI. 1. i. fig. (186^) (Anthrax).) 



One ¥ from the southern portion of the Oued Mj'a, Algerian Sahara, 4. v. 1912. 



This specimen does not altogether agree either with Dufour's figure, or with 

 his extremely brief description : the type of the species was taken in the vicinity of 

 Madrid. 



Genus CYTHEREA Fabr. 



* Cytherea argyrocephala Macq. 



{Mem. Snc. royule den Sc, de I'Agric. el des Aria de Lille, 1840, p. .'5.^3 (Anthrax) ; Dipt. Exiil., ii. 

 1, p. 55. PI. 20. fig. il (1840) (Ai,thra.T).) 



One S from Hammam R'lrha, Algeria, May 1908 (Hon. L. W. Rothschild). 



The type of C argi/i-ocephula Macq. was obtained in Algeria, and the British 

 Museum possesses a ? of this species from Coustantine, 7. v. 1895 (Rev. A. E. Eaton), 

 in which there are three submargiual cells in the right wing. The left wing of this 

 specimen is, however, perfectly normal, and does not exhibit even a trace of a 

 supernumerary transverse vein in the first snbmarginal cell. 



Under the name Malio itr(f>/rocejihahi.% Maecj., Becker {Zeitsclir.f. si/.sf. Ili/m. 

 u. J iipl.,'\\\. .hihnj., p. 91 (I9it3)) records the occurrence of this species in Egypt. 



BOMBYLllNAE. 



(Jenns GERON Meig. 



* Geron hybridus Meig. 



(KlaKtif., i. p. 180 (18U4) (JJomh/lhis).) 



One ? from the southern portion of the Oued Mya, Algerian Sahara, 4. v. 1912. 



Genus USIA Latr. 

 Usia florea Fabr. 



(/•;«/. StjHt., T. iv. p. 412 (I7'.l4j (Vidiiecetla).) 



Four (J<J and one ? from Hammam R'lrha, North Algeria, May 1911 (Hon. 

 Ii. W. Rothschild and Dr. E. J. 0. Hartert). 



The Museum previously possessed specimens of tiiis species from the same 

 locality, as well as others from Algiers, taken iv. Iicilli ('ascs in May 19U8 

 (Hon. L. W. Rothschild). 



