ICTRRID^. 



31 



Family K'TERID.E*. 



A. Flexure of mandible well marked and situated below posterior 



border of nasal aperture. 



B. A very large main fenestra in interorbital septum, with a 



small secondary one in front ; cranial deficiency large, 

 two-thirds of longth of interorbital fenestra. 



C. Frontal zygomatic process small but well marked ; the 



squamosal broad and blunt. 



D. Angular much prolonged backwards. 



E. Palatines with a slender prolongation of posterior external 



anole. 



Fiir. 1? 



iol so/ fzp S!P 



Lateral view of skull of Sturnella matjna. — io.f., interorbital fenestra ; so.f., 

 supraorbital fenestra ; f.z.p., frontal zygomatic process ; s.z.p., squa- 

 mosal zygomatic process ; a. backward prolongation of mandible. 



Genus CASSICUS. 

 Brisson, Orn. ii. p. OS (1700). 



Cassicus persicus. 



OrioJus i^ersicus, Linna;us, Syst. Xat. i. p. IGl (1700). 

 Cassicus persicus (Linn.), Sclater, Cat, B. Brit. Mus. xi. p. 321 

 (1886). 



The Yellow Hang-nest. 



Ilal). South America. 



120. Sternum, with shoulder-girdle. S. S. 1408. 



Presented J>y the Smithsonian fast iii/t Ion. 



* For the osteology of the geiuis Sturnella and the N. American Lleridfc, 

 rf. Shufeldt, .Tourn. Anat. Phys. xxii. pp. .'J09-3-TO, pi. xv. 



