133 



Described from 24 $ 14 (5 collected in August and Sep- 

 tember 1914 at Oloke Meji, Ibadan, Xigeria (J. C. Bridwell). 



Type S , allotype and paratypes in the author's collection, 

 paratypes in the collection of the Hawaiian Board of Agricul- 

 ture and Forestry. 



From the descriptions two previously described species 

 belong to this genus: 



Metylaeus catalaucoides new name. 

 Prosopis Bouyssoai Vachal. 



Ann. Soc. Ent. France 68:565 $ (nee ?) X'Doro 

 1899. 



Metylaeus scutispina (Alfken). 



Prosopis scutispina Alfken 



Deutsch. Ent. Zeitsch. 1914:195 $. Rhodesia. 



The former species appears to differ from enbratus by the 

 shorter (triangular) metanotal spine and the presence of a 

 yellow spot on the supraclypeal area, M. scutispina differs by 

 the red mandibles, labrum, and anterior edge of the clypeus, 

 the rest of the clypeus being yellow. The sculpture of the 

 second tergite in the description is not indicated as different 

 from that of the first. 



16. GXATHYLAEUS U. gCU. 



The single species described under this genus resembles 

 very closely the male later described as Hylaeus (Nesylaeus) 

 nesoprosopoides and the material from which they were de- 

 scribed was taken together. The mandibles of the two are, 

 however, wholly unlike and I have never seen a sexual dimor- 

 phism in the family Hylaeidae which would parallel this. The 

 first tergite is different in the two species but not more so than 

 in some Hylaeus. I do not, however, believe they belong to the 

 same species. 



It will be interesting to examine more material and the 

 generic characters can no doulit be amplified when the male 



