162 TRINIDAD AND TOBAGO BULLETIN. [XX.2,3&4. 



57. Anthracothorax nigricolles. Plastron. 

 Polytmus mango. Leotaud No. 64. 

 This species resembles the previous one m size and general 

 appearance, but can be distinguished in the male by the black (not 

 green) throat, slightly tinged at the edge with steely blue. 



In the male the head, back, upper wing coverts, upper tail 

 coverts, and middle tail feathers are bronze green. The outer tail 

 feathers are purple margined with black. Throat, breast and middle 

 of abdomen black, throat margined with steely blue. Sides of 

 abdomen and under wing coverts green. Under tail coverts black 

 A white line on sides of abdomen. 



The female is white on the under surface with a broad black 

 line, slightly tinged with blue at the sides, on the throat and extending 

 down the middle of the abdomen. The outer tail feathers have 

 white tips. 



This species 'was common in January 1921 in Maracas Valley 

 both over the river and far from it on the top of a small hill. In the 

 latter locality they were frequently seen hovering just beneath leaves 

 of coconut and picking off small insects from beneath the leaves. 

 The stomach of one shot in this position on January 14, was found to 

 contain a number of small Hymenoptera, probably parasites of scale 

 insects, etc., on the coconut leaves. 



Another shot whilst hovering over the river in the late afternoon 

 contained remains of small Diptera. 



I have not seen it nesting. 



According to Chapman it frequents the flowers of the Bois 

 Immortelle (Erythrina). 



58. Colobri delphincB. Brown Violet-ear or Blue-Eared Hummer. 

 Polytmus delphinae. Leotaud No. 66. 



This species according to Leotaud is rare and I have not 

 noticed it. 



Hellmayr records it at Aripo between 1,600 and 2,000 feet. 



It is greenish-brown above. Feathers on side of rump and 

 upper tail coverts rufous with dark centres. Tail greenish-brown 

 with a dark band near the tip. A patch of shining purple at the ears 

 and upper sides of the neck. General colour beneath dull greyish- 

 brown feathers margined with paler. Throat metallic green. Under 

 tail coverts rufous. 



The female is similar but smaller. 



I have no record of either feeding or nesting habits. 



