147 



Tergite i apically and 2 basally and apically a little contracted ; sternites 

 similar but distinctly irregularly finely and sparsely punctate. 



Pubescence noticeable only on sides of pronotum, middle of collar, 

 lateral apical hair patches on tergite i, emargination of sternite 5, apical 

 silvery patches on outer tips of the tibiae and a basal one on hind tibiae, 

 and the tarsi. 



First recurrent received by ist cubital cell, second interstitial. 



Length 5.5 mm. ; wing 4 mm. 



$ Stipites acute, extending beyond the sagittae ; 8th sternite with the 

 apical process V-shaped, the sides not produced ; 7th sternite with he 

 teeth rather feeble but long, the apical lobe long and strap-shaped, much 

 longer than the basal. 



Two 5 ? and two $ $ collected at Oloke Meji, Ibadan, 

 Nigeria, Aug.-Sept. 1914 (Bridwell). 



The 2 differs from Bouyssoui Vachal in the mesonotum 

 being not longitudinally impressed, the collar black, and the 

 first tergite practically impnnctate. 



Hylaeus (Deranchylaeus) rugipunctus Alfken. 



Prosopis rugipiincta Alfken. 



Deutsch. Ent. Zeitschr. 1914:192 $ $ Cape Colony. 

 ? Differs from iminarginata in the yellow collar and 

 coarser puncturing of the abdomen and the basal area of the 

 propodeum is margined behind. 



$ Has the supraclypeal area black, scape not widened. 



Hylaeus (Deranchylaeus) xanthostoma (Alfken). 



Prosopis xanthostoma Alfken. 



Deutsch. Ent. Zeitschr. 1914:196 9 $ South Africa, 

 Belgian Congo. 

 One 5 Oloke Meji, Ibadan, Nigeria, Aug.-Sept. 1914 

 (Bridwell). 



20. Xesylaeus n. subgen. of Hylaeus, 



The species which is described below is so similar in form 

 and general structure to the species of Hylaeus that I can find 

 no external structure distinguishing it. It has, however, the 

 eighth sternite bearing an apical process similar to that of 



