190 Mr. 1\ D. A. Cockerell — Descriptions and 



on pleura, fuscous on scutellum, thin and scanty on head 

 and thorax, except on postscutellum, where it is desise ; 

 antennae dark, flagellum reddened at apex; head large, 

 peculiar for the strongly elevated vertex and occiput, ivith the 

 small ocelli close together and remote from the eyes ; a A'ery 

 fine raised line runs from the midrlle ocellus to the middle 

 of the supraclvpeal area ; clypeus rugose ; supraclypeal area 

 dull, finely granular ; iront convex, very finely granular ; 

 sides of face and vertex more shining, the latter not evidently 

 punctate ; cheeks remarkably small, with a strong keel on, 

 upper part fast behind eyes ; prothorax flattened and angled 

 at sides in Iront of tubercles ; mesothorax dull, finely rugos?, 

 but much more coarsely sculptured than front; scutellum 

 dull, rugose along hind mnrgin ; area of metathorax large, 

 defined by absence of hair, entirely dull, with widely 

 separated fine raised lines, more or less, but very irregularly, 

 joined by transverse one^ ; posterior truncation large, hairy 

 all over, well defined above and at sides, the upper lateral 

 angles right angles; pleura with fine ridges giving a striate 

 effect; tegulcie dark ruious with a large piceous spot. 

 Wings hyaline, faintly dusky, stigma piceous, nervures 

 browner; second s.m. as broad as high, receiving first r. n. 

 near apex; third s.m. not greatly broader than second (no 

 broader above). Legs dark, including tarsi, their hair very 

 pale ochreous, short ai\d fuscous on outer side of middle and 

 hind tibiae ; bind tibiai broad ; hind spur with six long- 

 spines, close together. Abdomeji !)road, very finely punctured, 

 hind margins of the segments broadly impunctate, but not 

 discoloured ; basal declivity of first segment with much pale 

 ochreous hair ; dense basal bands on second and thii'd seg- 

 ments, that on second interrupted in middle ; fourth segment 

 hairv at extreme base; venter with long hair. 



tiab. KaUitara, Ceylon, March 1910 [E. Comber). 



A peculiar species. 



Halictus sigiriellus, sp. n. 



$ . — Length about or hardly 6 mm. 



llobust, black, with pale slightly yellowish hair : head 

 and thorax dull and finely roughened, abdomen shining; 

 head broad, clypeus rugos-e, front finely granular; vertex 

 and ocelli normal; flagellum faintly reddish apically ; cheeks 

 rather small but normal, with no keel on upper part ; meso- 

 thorax and scutellum rough, the latter evidently finely 

 reticulate; postscutellum and hind margin of mesothorax 

 covered with pale tomentum ; the thin hair of scutellum 



