382 Col. C. T. Bingham on S. African and Australian 



median segment compressed posteriorly, tlie apex truncate, the face 

 of the truncation crossed by a vertical, well-marked carina and 

 bordered on each side by similar carinae, the basal concavity on the 

 segment lunate and edged anteriorly and posteriorly by a series of 

 large punctures or ])its ; wings hyaline, slightly fuscous, legs slender, 

 minutely pubescent. Abdomen about as long as the head and 

 thorax united, the 2nd segment with traces on each side of a fringe 

 of white hairs. 



Length 5 5 mm. Exp. 9 mm. 



Described from a single example. 



Easily distinguishable from all described forms of 

 Prosopis by the sculpture and by its uniform black colour 

 entirely devoid of yellow markings. 



Family API DAE. 



Halictus inornatus, form n. 



Cape Colony : Zwartkops, near Port Elizabeth : Aug. 11, 

 1905 {G. B. Longstaff). 



5 . Dull black, covered with soft long reddish-brown erect hairs, 

 the 2nd to the 5th abdominal segments with lateral transverse short 

 bands of whitish-yellow pubescence at their bases, the anal rims 

 ferruginous, the legs covered with yellowish pubescence which turns 

 to ferruginous on the inner side of the posterior metatarsi, the tibial 

 calcaria of the posterior legs yellowish-white at base, ferruginous 

 towards their apices, the claw joint and claws of all the tarsi fer- 

 ruginous. Head as broad as the thorax, flat in front, closely 

 punctured, the clypeus slightly convex transversely and broadly 

 truncate anteriorly. Thorax more sparsely and tinely punctured, 

 the depressed area at base of the median segment lunate and 

 very closely punctured, the punctures running into longitudinal 

 striae. Abdomen very minut-ely and sparsely punctured, shining 

 above. 



Length ? 10 mm. Exp. 18 mm. 



Described from a single example. 



Ceratina vittata, form n. 



Orange River Colony : " Wonderboom," near Pretoria : 

 Aug. 31, 1905 {G. B. Longsta^). 



$ . Black, two large coalescent spots on the labrum, a very broad 

 j_-shaped mark on the clypeus and a narrow line on the front of 



