Records of Bees, 487 



white hair ; clypeus very densely punctured, not keeled^ its 

 lower margin in the middle with a pair of small nodules, and 

 projecting between them a tuft of pale orange hair ; supra- 

 clypeal region elevated, convex, very densely punctured, the 

 punctures running into striae ; front very densely punctured ; 

 vertex with extremely large separated punctures ; punctures 

 on mesothorax and scutellum large and distinct (but not so 

 large as those on vertex), those on mesothorax more or less 

 running into striae; area of metathorax granular; hind part 

 of mesothorax with a few hardly noticeable brown hairs ; 

 tegulse piceous. Wings dusky ; anterior tibise and tarsi 

 with bright ferruginous hair on inner side ; hind basitarsi 

 broadened and flattened, with red hair on inner side; spurs 

 light reddish. Abdomen finely but very distinctly punctured, 

 segments 2 to 4 very strongly transversely sulcate, the 

 punctures beyond the sulcus larger than those before. 



Hab. Formosa (Sauier). One female in Berlin Museum. 



In Bingham^s table of Indian species this runs to 

 M. cephalotes, Smith, which has a quite differently shaped 

 head. The second and third joints of the maxillary palpi 

 are very bristly ; the claws have no basal tooth ; the last 

 abdominal segment is higher than long, vertically descending 

 until it bends to form the apical lip ; these characters, with 

 the narrow form and general structure and appearance, 

 justify the inclusion of M. spissula in Robertson's subgenus 

 or genus Oligotropus, hitherto known only in the North 

 American fauna. 



Megachile tranquilla, sp. n. 



? . — Length 8-9 mm. 



Black, with black and white hair, the abdomen with con- 

 spicuous narrow entire white hair-bands ; ventral scopa 

 white, sufi'used in the middle with ferruginous, on last 

 segment black ; form rather compact ; general appearance 

 exactly like the European M. rotundata ; it may be known 

 from rotundata, and also from all the closely allied Formosau 

 species, by the dense white hair of the front having con- 

 spicuous black hairs intermixed. Another very similar 

 species is the Australian M. quinquelineata, Ckll., but this 

 has the hair on inner side of hind tarsi purplish black, 

 whereas in M. tranquilla it is clear ferruginous. Other close 

 allies are M. seychellensis, Cam., from the Seychelles Islands, 

 and M. pahnarum, Perkins, from the Hawaiian Islands. 



Mandibles quadridentate ; hair of head white, black on 

 vertex, and mixed with black on front ; clypeus very densely 



