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



Megachile stalkeri, sp. n. 



$ . — Length about 9 mm. 



Of the parallel-sided type; head and thorax black ; abdo- 

 men with the first two segments and extreme base of third 

 black, the rest with the tegument deep chestnut-red, with 

 scanty white pubescence. Head large and thick, longer 

 than broad ; vertex broad ; cheeks nearly as broad as eyes ; 

 front and vertex strongly and closely punctured, shining 

 between the punctures ; much pure white hair at sides of 

 face, and a tuft on each side extending over antenna?; scape 

 black, red at end ; flagellum bright red, black at apex above ; 

 mandibles black, thick; clypeal region extremely peculiar; a 

 large blunt spine, directed obliquely downwards and out- 

 wards, projects from the supraclypeal area ; sides of clypeus 

 produced into broad outwardly-directed lamella?, which are 

 triangular and pointed ; disc of clypeus shining, appearing 

 deeply sunken between the great iamella?, the excavation 

 suboval in form ; mesothorax and scutellum shining, with 

 very strong well separated punctures; a conspicuous patch 

 of white hair at each corner of mesothorax, but none in 

 scutello-mesothoracic suture ; area of metathorax strongly 

 wrinkled basally; tubercles and sides of metathorax with 

 much pure white hair ; teguke dark reddish brown. Wings 

 hyaline, nervures and stigma dark brown. Legs black, 

 anterior femora and tibia? largely chestnut-red in front; spurs 

 yellowish white ; second and third abdominal segments with 

 a marginal patch of white hair on each side ; ventral* scopa 

 entirely white. 



Bab. Alexandria, N. Australia, Dec. 20, 1905 ( W. 

 Stalker) . 



Rather like M. pararhodura, but much smaller. The 

 extraordinary clypeal structure is quite distinctive. 



Megachile austeni, Ckll. 



Mr. Turner took this at Mackay (Feb. 1900) and Cairns 

 (Kur., 1.02). 



The Cairns specimen before me is larger than that from 

 Mackay, but I do not know whether this is an individual or 

 racial peculiarity. 



Megachile quinquelineata, Ckll. 



Mackay, Queensland, at flowers of heliotrope, Sept. 1899 

 (Turner) ; Cape York, April 1902, 2 ? (Turner). 



