REVISION OF STEEPSIPTERA PIERCE. 135 



has been translated as prsescutum, and "segment mediaire" as 

 scutellum, but this may be entirely wrong.) 



2. PSEUD OXENINI, new tribe. 



Pseudoxenides Saunders, 1872. 



Type genus. — Pseudoxenos Saunders (1872). 



Parasitic on Eumenida?. 



The tribe includes three genera: 



13. Pseudoxenos Saunders (1872), parasitic on Odynerus (sens lat.); 

 Europe. 



14. Leionotoxenos Pierce, parasitic on Leionotus; America. 



15. MoTwbiaphila Pierce, parasitic on Monobia; America. 



The author has used a grouping into tribes of those genera para- 

 sitic on hosts of the same family, believing that as soon as sufficient 

 material is at hand this grouping will be justified. For this reason 

 the tribe is limited to the eumenid parasites. 



13. Genus PSEUDOXENOS Saunders (1872). 



Name derived from feudoc (so called) + Xenos, meaning so-called 

 Xenos. 



Type of genus. — Pseudoxenos schaumii Saunders (1872). 



The genus is, in the broad sense, parasitic on the old genus Odynerus, 

 but in the typical sense on the genus Ancistrocerus, formerly a part 

 of Odynerus. At present it is known only from Europe. 



The genus can only be satisfactorily characterized at present by 

 the presence of eight longitudinal veins in the wings, with two dis- 

 connected veins between the radius and medius. The further 

 generic character, the general form of the genital apparatus, is as 

 yet undescribed. Saunders's use of the antenna 1 is without doubt 

 unavailable, due to alteration of shape on drying. 



i. PSEUDOXENOS SCHAUMII Saunders (1872). 



Host. — Ancistrocerus (Odynerus) parietum Linnaeus; Corcyra, Octo- 

 ber (pi. 10, fig. 2). 



This species was described by Saunders as follows : 

 Black, with antenna?, maxilla?, elytra, and legs brown; abdomen 

 flavescent, with a transverse brown vitta on each dorsal tergite 



a Ob term d'une pupe portee sous le 4« tergite abdominal d'une ouvriere de Vespa 

 ducalis Sm., provenant de Hue, dans l'Annam (E. Fleutiaux, 1905, Museum de Paris); 

 le cephalothorax de la pupe faisant legerement saillie sur le cote droit de la guepe. 



Male. — Semblable au Xenos vesparum Rossi male, dont il se distingue par sa grande 

 taille, son corps lisse et brilliant, sans tomentum veloute; par l'ecusson beaucoup 

 plus long, sa longueur etant egale environ a deux fois la largeur de sa base; enfin par 

 le disque du segment mediaire plus allonge les cotes moins 'arques. Long. 5 mil. 

 (Buysson, 1906). 



