MBQACHILE. 475 



831. Megachile tuberculata, Smith, Jour. Linn. Soc 1858, p. 46, 5- 

 P Megachile longipalpis, Eadoszk. Wiadom. z nauk Przyrod. pt. ii 



(1882), p. 78. 



$ . Head, thorax, and abdomen densely but not coarsely punc- 

 tured ; head as wide as the thorax ; mandibles long, curved, some- 

 what naiTOW, with a blunt tooth on the inner margin near the 

 base and three apical teeth ; clypeus short, broad, produced in the 

 middle into a long prominent tubercle ; the vertex behind the 

 ocelli flattish, broad, with an abbreviated medial longitudinal carina. 

 Black, with black pubescence ; the median segment posteriorly aud 

 the basal segment of the abdomen with sooty-brown pubescence ; 

 the pollen-brush black ; wings f ulvo-hyaline, the apical margins 

 light fuscous. 



Hah. Tenasserim ; Singapore ; Borneo. $ . Length 22-25 ; 

 exp, 44-48 mm. 



832. Megachile atrata, Smith, Cat. i, p. 182, $ . 



Megacliile fulvipeuuis, Smith, New Sj}. Hym. B. M. p. 68, 5 • 



2 . Head in front somewhat coarsely and sparsely punctured, . 

 shining ; the clypeus short, broad, longitudinally striate, anteriorly 

 broadly emarginate, the emargination square ; a medial vertical 

 carina not quite reaching to the apex ; thorax coarsely transversely 

 rugose ; abdomen moderately, finely, and densely punctured ; 

 segments 1-4 with a transverse narrow subapical groove above. 

 Black, with jet-black pubescence ; the pollen-brush black, m 

 some specimens slightly reddish along the middle ; wings fusco- 

 hyaline or f ulvo-hyaline, with a broad fuscous margin (the common 

 form). 



(S similar, smaller ; the apical segment carinate down the middle, 

 the sides broadened and recurved, the apex incised ; clypeus with 

 a little dense white pubescence above and anteriorly. 



Hah. Burma ; Tenasserim ; Nicobars ; Philippines. $ . Length 

 18-22 ; exp. 40-42 mm. 6 . Length 15 ; exp. 2^ mm. 



*833. Megachile heteroptera, Sich. Novam-Reise, Ht/m. p. 149 ; Ball. 

 Torr. Cat. x, p. 4o3. 



" $ closely allied to and resembling M. atrata ; differs in having 

 the clypeus anteriorly rounded, not emarginate, and in the pollen- 

 brush being reddish in the middle. 



" (5 similar to the same sex in M. atrata, but the pubescence on 

 the front and clypeus fulvous red, not white. 



'■'■Hah. Nicobars. $. Length 17-21; iving 11-13 mm. {exp. 

 about 26-30 ram.). J somewhat smaller." 



834. Megachile ardens, Smith, New Sp. Hym. B. M. p. 67, ?. 



2 . Head, thorax, and abdomen pubescent ; the head above the 

 ocelli, cheeks, and clypeus bare, very finely and closely punctured, 

 the anterior margin of the last emarginate, with the lateral angles 

 of the emargination dentate and a -f -shaped i-arina at the base. 

 Black ; the front above the auteunsa with a little black pubescence ; 



