82 



Clark, Pterylosis of Swifts and Hummingbirds. 



["Auk 



Chrysolampis. 



In his account of Trochilus moschitus Nitzsch ('40) refers to 

 the small aftershaft, the absence of down, the broad, rhombic 

 form of the dorsal tract, the long and rather broad spinal apterium, 

 the slight development of the femoral tracts, the nuchal apterium, 

 and the large oil gland. The figure given (Plate III, fig. 19) was 

 probably prepared from a skin and is seriously defective in its 

 representation of the tracts and spaces on the head, neck, and 

 posterior part of the back. 



Leucochloris. 



There is nothing specially noteworthy about this genus, except 

 that in both specimens the right wing had 7 secondaries and the 

 left 6, but all four wings were clearly aquincubital. In one speci- 

 men the formula for the rectrices is 1-2-3-4-5 and in the other 

 it is 3-2-1-4-5. 



Specimens examined. 



Eugenes. 



The pterylosis of this genus is exactly like Coeligena. There are 

 6 or 7 secondaries and the formula for the rectrices is 5-4-3-2-1 

 in the male and 4-3-2-1-5 in the female. 



Specimens examined. 



