190 Mr. T. D. A. Cockerell — Descriptions and 



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

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

 antenncB dark, flagellura reddened at apex; head large, 

 peculiar for the strongly elevated vertex and occiput, with the 

 small ocelli close together and remote from the eyes ; a very 

 fine raised line runs from the middle ocellus to the middle 

 of the supraclypeal area ; clypeus rugose ; supraclypeal area 

 dull, finely granular ; front convex, very finely granular ; 

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

 punctate ; cheeks remarkably small, with a strong keel on 

 vpper part just behind eyes ; prothorax flattened and angled 

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

 but much more coarsely sculptured than front; scutcllum 

 dull, rugose along hind nuirgin ; 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 ones ; 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; teguUe dark rufous with a large piceous spot. 

 Wings hyaline, faintly dusky, stigma piceous, uervures 

 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 and fuscous on outer side of middle and 

 hind tibise ; hind tibine broad ; hind spur with six long 

 spines, close together. Abdomen broad, very finely punctured, 

 hind margins of the segments broadly inipunctate, but not 

 discoloured ; basal declivity of first segment with nuicli pale 

 ochreous hair ; dense basal bands on second and third seg- 

 ments, that on second interrupted in middle ; fourth segment 

 hairy at extreme base; venter with long hair. 



Hab. Kahitara, Ceylon, March 1910 {E. Cumber). 



A peculiar species. 



Halictus sigiriellus, sp. u, 



$ . — Length about or hardly G mm. 



Robust, black, with pale slightly yellowish hair : head 

 and thorax dull and finely roughened, abdomen shining; 

 head broad, clypeus rugose, front linely granular; vertex 

 and ocelli normal ; fiagellum faintly reddish apieally ; checks 

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

 thorax and scutcllum rough, the latter cviilcntly finely 

 reticulate; postscutellum and hind margin of mesothorax 

 covered with pale tomentum ; the thin hair of scutcllum 



