ARABIAN HyMENOPTEEA, 



S3 



- -*- Band of the protliorax slightly excavated on the 

 hmd side, ..... 



II A spot ou each side behind the first band. 

 •j-j- Abdomen with the band of the first segment 



not excavated, 

 I First band with a yellow spot on each side in 

 front. ..... 



II First band with no spot in front 

 :n:=;5 Abdomon with luteous bands, 

 f Band of the abdomen broadly excavated on the 

 fore side, ..... 



If Band of the abdomen narrowly excavated on 

 the fore side. - . • - 



B. Abdomen with red colour. 



a. Abdomen with the band of the first segment 



excavated. 

 -:= Band very broadly excavated, 

 f Scutellum with a band. 

 I Abdomen with a patch on each side behind the 

 first band. - - . - . 



II Abdomen with no patch, 

 ft Scutellnm with two spots. 

 •r"^- Band broadly excavated. 

 I Band of the prothorax not concisely abbreviated 

 on each side, .... 



ft Band of the prothorax concisely abbreviated on 

 each side. ..... 



=** Band narrowly excavated. 



b. Abdomen with the first band not excavated, - 



guttulosus. 

 cingulifer. 



mutabilis. 

 alienus. 



exustus, 

 stipatus. 



dotatus. 

 diversus. 

 cognatus. 



tinctus. 



privatus. 

 torridus. 

 selectus. 



169. Odynerus flavus. Male. — Yellow, finely punctured. 

 Vertex black. Mandibles with black tips. Antennae red; first 

 joint yellow. Disk of the fore part of the thorax, base of the 

 scutellum and a conical spot on the metathorax black. Abdomen 

 ■with a black basal spot. Wings shghtly cinereous ; veins black. 

 Fore wings with a narrow blacldsh border. Length of the body 

 5 lines. 



Wady Fen'an. 



170. Odynerus torridus. Female. — Black, roughly punctured. 

 Head with a streak behind each eye, three spots between the eyes 

 and face red. First, second and base of the third joint of the antennae 

 red. Fore part of the thorax, a band on the scutellum and a large 

 spot on each side of the scutellum red. Abdomen with two red 

 bands ; first band very broad, very deeply excavated in the middle of 



