COLLECTED IN BORNEO, ETC. 45 



marginal cells, the second receiving both the recurrent nervures ; legs 

 with the femora broad and compressed ; the calcaria at the apex of 

 the intermediate tibia? stout, acute, and bent at the apex, its hinder 

 margin toothed like a fine comb ; the inner spine of the posterior cal- 

 caria toothed in a similar manner, the teeth much longer, those at the 

 base of the spine longest, decreasing in length to the apex ; the pos- 

 terior tibiae and basal joint of the tarsi densely covered with long hair ; 

 the claws of the tarsi bifid. Abdomen subovate, truncated at the base. 



This is a very remarkable genus of Bees : it appears to be most nearly 

 allied to the genus Macrojns ; the neuration of the anterior wmgs is 

 very similar, and the labial and maxillary palpi consist of the same 

 number of joints ; the ocelli are placed in a curve, and the posterior 

 legs have a dense clothing or pollen-brush as in that genus. 



The beautiful comb with which the posterior tibiae are furnished is doubt- 

 less for the purpose of removing the grains of pollen collected on the 

 hairs which clothe the shanks. (Plate I. details.) 



1. Ctenoplectra chalybea. C. capite thoraceque nigris, abdomi- 

 neque chalybeo, pedibus posterioribus dense pilosis. 



Female. Length 6 lines. Head and thorax black : the head closely 

 punctured ; the clypeus shining, the punctures more scattered, and 

 with a slight carina in the middle of its base ; the scape in front, and 

 the flagellum beneath, rufo-piceous ; the mandibles ferruginous at 

 their apex. Thorax opake-black : the metathorax smooth and shining 

 in the middle of its base, the sides covered with sooty-black pu- 

 bescence ; wings fuscous, palest at their apical margins ; the posterior 

 tibiae and basal joint of the tarsi densely covered with long black 

 pubescence, the inner pectinated calcar pale testaceous-yellow. Ab- 

 domen : steel-blue above, black beneath. 



Hab. Malacca (Mount Ophir). 



Subfam. Dasygastbje. 

 Gen. Megachile, Latr. 



1. Megachile atrata, Smith, Cat. Hym. pt. 1. p. 182. 

 Hah. Borneo (Sarawak) ; Philippine Islands. 



2. Megachile ornata, Smith, Cat. Hym. 1. p. 183. 

 Hab. Borneo (Sarawak) ; India. 



3. Megachile umbripennis, Smith, Cat. Hym. pt. 1. p. 1/5. 

 Hab. Borneo (Sarawak) and Nepaul. 



4. Megachile amputata. M. nigra; capite thoraceque pube fulva 

 vestitis ; abdominis segmentis apicalibus fulvo marginatis ; pedibus 

 rufis. 



Female. Length 7 lines. Black : the head and thorax clothed above 

 with fulvous pubescence, on the cheeks and thorax beneath it i^ 



