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



ferruginous. Wings moderately dusky, b. n. going basad of 

 t.-m. Spurs and small joints of tarsi ferruginous. The 

 coloration of the abdomen agrees with that in A. himaloyensis, 

 Rad., but the hair on the legs is differently coloured, the 

 clypeus is not carinate, &c. The marginal cell is shorter and 

 the first r. n. joins the second s.m. further beyond the middle 

 than in A. khambana. 



Bab. Khamba Jong, Sikkim, 15,000-16,000 ft., 15-30. 

 vii. 03; Tibet Exped. Brit. Museum. 



Bombus sumatrensis, Okll., var. ardentior } nov. 



$ . — Length about 17 mm. 



Structure as in B. sumatrensis : hair of face, front, vertex, 

 and cheeks entirely black ; of labium reddish black ; of thorax 

 above yellowish white ; of abdomen black, on fourth and fit'tli 

 segments rather dull ferruginous. A colour-variety only, with 

 the abdominal band red instead of yellowish white. 



Bab. Sumatra, " x. 1, 5. 81." British Museum, 92. 182. 



Bombus irisanensis, sp. n. 



$ . — Length about 14 mm. ; expanse '61. 



Black, the hind tibiae and tarsi and small joints of other 

 tarsi obscure reddish ; hair of head all black except a little- 

 reddish on labrum and mandibles; hair of thorax above 

 entirely black, but on pleura fulvous; first two segments of 

 abdomen entirely and densely covered with bright yellow 

 hair (a rather fulvous yellow), the others with black, and the 

 venter also with black; legs with black hair. Wings ample, 

 deep iuliginous, but still transparent enough for print to be 

 easily read through them. Clypeus convex, smooth and 

 shining in the middle, punctured at sides; malar space longer 

 than broad ; a red tubercle at base of mandibles ; ocelli very 

 small ; third antennal joint about as long as fifth. 



Structurally this much resembles B. sumatrensis, but the 

 colours are entirely different. The colour will also readily 

 distinguish it from the Philippine B. mearnsi, Ashmead. In 

 the colour of the wings it resembles the Chinese B. hosmor- 

 rhoidahs, Sm., but that has a short malar space and many 

 other differences. 



Hab. Irisan, Benquet Prov., Luzon, Philippine Islands, 

 May 28. British Museum, 1906-44. 



Bombus nrfipes, Lep., var. melanopoda, nov. 



? . — Length about 25 mm. ; anterior wing 18. 

 Robust, black,: with black pubescence, that on apex of 



