556 VTERYLOGRAPHY OF aOAT-SUCEEBS AND OWLS— CLARK. vol.xvii. 



surface agrees Tritli Phalcc)ioj)tilus, altliougli tlie dorsal tract is mucli 

 broader, and there appear to be no scattered contour feathers on the 

 back. Ventrally Antrostomus differs from the '^ Poor-wills " in a much 

 greater sparseness of feathers on the chin (fig. 4) and in t!ie continued 

 breadth of the sternal tracts, which become narrower only as they enter 

 on the sarface of the abdomen. The feathering of the tibia does not 

 end at the joint, but extends down on the tarsus in front, more than 

 half way to the toes. 



Specimens examined. 



It will at once be seen from the above description and figures that 

 my observations on the pterylosis of this genus differ radically from 

 those of Dr. Shufeldt.* In regard to this difference, Tiv. Shufeldt 

 assures nie that he has compared his figure, since its publication, with 

 other si)ccimens and has found no changes necessary. He has, how- 

 ever, very kindly permitted me to examine his original drawings, and 

 it is only fair to say that they do not differ so much from mine as do 

 the figures in the plate. The latter seems to have been A^ery carelessly 

 executed, and so it is desirable to' have a more accurate figure, which I 

 hoj)e is to be found above. 



(ienus N Y C T I D E O M U S . 



In this genus the wing is very much like Antrostomus, as there are 

 twelve secondaries, and the ten primaries give the following formula: 

 8,9,7,10,0,5,4,3,2,1. 



On the head (fig. 5) we find an arrangement of the rows quite different 

 from the other three genera. There is the usual double row running 

 from the foot of the culmen over the middle of the head, back to the 

 cervical tract. Beside this and parallel to it are two single rows some 

 distance from it and from each other. There is then a fifth complete 

 row, running from the angle of the month beneath the eye, forward, 

 then up and back over the upper eyelid, and finally into the cervical 

 tract with the other four. From the inner side of this row a branch 

 runs forward for some distance along the superior edge of the eye 

 cavity. The row of rictal bristles is prominent, and there are a num- 

 ber of contour feathers, filling the spare between it and the fourth 

 longitudinal row. The upper cervical tract is very narrow, while the 

 dorsal tract is rather broad. The spinal space is not very clearly 

 defined, and there are several rows of strong contour feathers (with 

 weaker ones scattered about) running at almost right angles to the 

 dorsal tract, extending out from its anterior end. The femoral tracts 

 are unusually well developed, and the tibi.e are feathered very 



* Journal of tlie Liuneau Society, xx, p. 299. 



