CEYPTUEUS. 459 



brunneis, fasoiis transversalibus nigris Tix distincfcis ; secundariis extus arenario et nigro fasoiatis ; 

 corpore subtus ut in G. boucardi colorato. Long, tota circa 10-5, alse 6-6, caudae 1-6, culm. 1-0, tarsi I". 

 (Descr. maris adulti typici ex San Bias. Mus. nostr.) 



Eab. W. Mexico, San Bias, Tepic {Richardson^), Mazfatlan {Grayson'^). 



This is a western form of C. cinnamomeus, or rather of C. mexicanus, but is 

 distinguishable by its greyish breast. The flanks are rufescent, with bars of brown, 

 the upper surface being very faintly marked with wavy blackish bars on the lower back, 

 rump, and upper tail-coverts, while the vermiculations on the wing-coverts are almost 

 obsolete. The back of the neck and mantle are plumbeous brown, and the front of the 

 neck and breast are shaded with grey, the throat being pure white. 



The type-specimen is probably not quite adult, as there are several spots of bright 

 ochre on the greater coverts and secondaries. Mr. Nelson, however, confirms the 

 distinctness of C. occidentalis, which he says inhabits low scrubby thickets of arid 

 tropical districts. 



58^ 



