Vol. XXII, pp. 69-74 April 17, 1909 



PROCEEDINGS 



(JF TH^F, 



BIOLOGICAL SOCIETY OF WASHINGTON 



NEW GENERA, SPECIES AND SUBSPECIES OF FOR- 



MICARIIDJ^], FURNARIID.E, AND 



DENDROCOLAPTID^. 



BY ROBERT RIDGWAY. 



[By permission of the Secretary of the Smithsonian Institution.] 



Megastictus gen. nov. (Formicariidx.) 



Related to Pygiplila Sclater and Thamnistes Sclater and Salvin. DifFer- 

 inoj from the former in having tlie tail two-third.s as long an wing and 

 nuich rounded or graduated (instead of much less than two-thirds as long 

 and truncated); from the latter in relatively smaller hill (distance from 

 nostril to tip of maxilla less than length of middle toe without claw) and 

 very different coloration. 



Type. — Myrmeciza margaritata Sclater. 



(M^7os, large; (ttikt6s, marked, spotted.) 



Myrmopagis gen. nov. ( Formicariids' .) 



Related to Myrmotlierula Sclater, hut differing in relatively much longer 

 tail (much more than half to more than two-thirds as long as wing), 

 much stouter and relatively shorter and less depressed bill, the adult 

 males neither streaked nor plain gray nor slaty. 



Type. — Mynnothera axillaris A'ieillot. 

 {Mvpfj.T]^, an ant; 7ra7is, a traji. ) 



Rhoporchilus gen. nov. {Formicariidfe.) 



Related to Drymoj)hila Such, hut with nostril slit-like and very broadly 

 operculate, rictal bristles obsolete, feathers of chin and forehead without 

 trace of terminal setfe, tarsus nearly half as long as wing and with plantar 

 scutella very distinct on both sides. 



Type. — Fonnicivora speriosa Salvin. 



('Paii/' Cpcoiris), bush, underwood, brushwood; opxl^^os, a wren. ) 



Myrmorchilus gen. nov. { Formicariidie . ) 



Related to Rhoporchilus but rictal bristles obvious, feathers of chin and 

 foreheail with distinct terminal setpe, tarsus twice as long as middle toe 

 10— Peoc. Biol. Soc. Wash., Vol. XXII. 1909. (69) 



