70 BIRDS OF BRITISH GUIANA. 



Genus STICTOMYRMORNIS Chubb. 



Stictomyrmornis Chubb, Bull. Brit. Orn. Club, xxxix. p. 59, Feb. 1919. 

 Type S. ntsvius (Gmel.). 



,S<^: 



Fig. 33. — Stictomyrmornis nteviuB. 



The species that 1 havp separated as a new genus under the 

 above title had also been placed by previous authors in the genus 

 Hypocnemis. It is, however, easily distinguished by its flat and 

 muscicapine bill, the width of which at the base is about three- 

 fifths the length of the esfl-ioaed culmen. The wing is rounded, 

 the third, fourth, and fifth primaries longest and equal, the 

 third shorter than the sixth but longer than the seventh. Tail 

 nearly square, the outer feather on each side being about eight- 

 ninths the length of the middle ones. The feet are small, the 

 tarsus is about one-fourth longer than the exposed culmen. 

 Coloration : male and female similar. 



393. Stictomyrmornis naevius. 



Spot-backed Ant-Creepee. 



Pipra ncBvia Gmel. Syst. Nat. i. p. 1003, 1789 (Cayenne). 

 Hypocnemis theresm (part) Sclater, Cat. B. Brit. Mus. xv. p. 292, 1890 



(Oyapoc, Cayenne). 

 Hypocnemis nmvia Brabourne & Chubb, B. S. Amer. i. p. 213, no.' 2142, 



1912. 



Adult male. Head, upper back, scapulars, and lower back rust- 

 brown, somewhat more rufous on the upper tail-coverts ; the 

 feathers on the middle of the back have white bases which form 

 a concealed dorsal white spot, the apical portion black with a pale 



