284 Mr. T. D. A. Cockeiell — Descrij)tions and 



Hah. Formosa ; one at Takao, July 26 {Sauter). Berlin 

 Museum. 



I previously recorded this as M. bicolor, hut a renewed study, 

 in comparison with the Indian form, indicates that it is 

 subspccifically distinct. It looks like 31. rufovittata, but, 

 aside from the colour of the scopa, the clypeus is depressed 

 in the middle and the shining supraclypeal area is more 

 finely punctured. 



Megachile caldweUi, sp. n. 



$ . — Length about 17 mm. 



Kobust, black, with pale hair ; bead broad ; sides of face 

 and front witb much white hair ; clypeus irregularly punc- 

 tured, the punctures of different sizes, the middle depressed 

 and more sparsely punctured, the apical margin broadly 

 shallowly emarginate and depressed in tlie middle; supra- 

 clypeal area transversely obtusely elevated, with a shallow 

 transverse median depression ; flagellum pale brownish 

 beneath ; vertex rather densely punctured on a sliining 

 ground ; mesothorax with strong rather close punctures ; 

 scutellum extremely densely punctured; hair of tliorax pale, 

 but pleura with a very broad band of fuscous hair from the 

 wings downward ; tegulre dark castaueous. ^Vings reddish. 

 Legs with pale hair ; middle femora broadly flattened behind ; 

 inner side of tarsi with ferruginous hairs ; hind basitarsi 

 very broad. Abdomen broad, hardly tapering, the hind 

 margins of the segments rather narrowly ferruginous ; 

 dorsal surface of abdomen covered with light ferruginous 

 hair, and ventral scopa entirely of the same colour. 



Hub. Foochow, China (//. 'R. CahUceU). U.S. National 

 ^luseum. 



In my table of Chinese Megachile (Trans. Amer. Ent. Soc. 

 1910, p. 212) this runs nearest to M. monyolica, which is a 

 much smaller species. In Bingham's table of Indian species 

 it runs nearest to .1/. ardens, which has black pubescence on 

 the front and fuscous black on the legs ; or to M. fulvo- 

 vestita, which has the clypeus carinate. The face and 

 mandibles are constructed much as in M. bicolor. Super- 

 ficially, the insect looks like the Formosan M. takaoensis, 

 but the wings are not so dark, the clypeus and supraclypeal 

 area are quite different, and the mandibles have a strong 

 Y-shaped ridge, wanting in takaoensis. M. cahhcelli may l)e 

 said to combine the principal structural characters of bicolur 

 with the appearance and colour ot" takaoensis. The larger 

 size, white hair of face, less densely punctured mesothorax. 



