NOVITATBS ZOOLOGICAE XXIII. 1916. 243 



The so-called "upper angles of the metathorax" are sharp, and separated from 

 the postscutellnni by an evident fissure (group of simplex ?) 



62. Another S of crenatus ? (Postscutellum yellow). (Oued Nca). 



63. Odynerus {Lionotus)fastidiosus Sauss. ? ? (Djebel Mekter). 



A very large insect quite corresponding to Saussure's description of fastidiosus, 

 except that all its markings are pure yellow (not " ferruginous " !) 



64. Odynerus (Lionotus) rossii Lep. S (Am Sefra). 



65. Odynerus {Lionotus) sp. ? ? (Ain Sefra). 



This may be a variety of tripunctatus F. ; but its coloration neither quite 

 agrees with Lepeletier's description, which Saussure endorses, nor with that of 

 the specimens called tripunctatus at South Kensington. The scutellum and 

 postscutellum are entirely black, the propodeum black with a small roundish red 

 spot on each side. The first abdominal segment has a black central stripe dividing 

 its declivous basal surface, and there is also a small black spot on the middle of its 

 dorsal disc. The base of the second segment is occupied by a black fascia angularly 

 produced in the middle and undulately on the sides ; on its disc there is an obscure 

 vague clouding such as Saussure mentions in describing his sessilis ("un T renverse") ; 

 and before its apex there are two lateral spots, as apparently in all forms of this 

 group (tripunctatus, sessilis, and filipalpis). The apical margin of this segment 

 appears to me quite simple ; and this, if Saussure's account of filipalpis and sessilis 

 is correct, would distinguish the present form from either of them. In specimens 

 which I believe to be true sessilis from Spain, the margin of this segment is, as 

 Saussure states, " cannele transversalement et un peu releve." On the whole 

 I should call the present insect, provisionally, a variety of tripunctatus, F. 



66. Odynerus {Lionotus) canaliculars Saass. ? (Oued Nca). 



The clypeus in this specimen is entirely black ; but I cannot doubt that it is 

 a true canaliculars, as it possesses all the extraordinary structural characters by 

 which Saussure distinguishes his species. 



67. Odynerus {Ancistroceros) parietum L. <$ (Djebel Mekter). 

 63. Pterochilus ornatus Lep. ? (Oran). 



The species was described from a $ , also taken at Oran, by Lepeletier's son. 

 This, I do not doubt, is its $ , hitherto apparently unknown. 



Apart from sexual differences, Lepeletier's description of the $ exactly suits it, 

 except that on the first abdominal segment only a small triangular spot is black. 



In this ? the maxillary palpi (N.B.) are much dilated, rounded at the apex, 

 and completely encircled by a fringe of very long curving hairs. It belongs, 

 therefore, to the group of phaleratus, kellenicus, etc., not to that of numida and 

 bembeciformis (terricola). 



69. Ceramius fonscolombei Latr. ¥ (Ain Sefra). 



70. Colletes ckobauti Perez 3 (Djebel Mekter). 



71. „ „ „ ? (Oued Nca). 



I name these with some hesitation, being single specimens and the male 

 armature, etc., imperfectly visible. Bat they seem to agree with examples in my 

 own collection named by Pe"rez. 



72. Hylaeus (= Prosopis auctt.) variegatus F. (Ain Sefra). 



73. Halictus sp. (?) S (Ain Sefra). 



