672 THE GENUS FORMIC ARIUS KIDGWAY. 



witb little, il' any, visible cloudiuj;: of dusky along- the median line. 

 Their measurements are as follows: No. 43537: Length (skin), 0.75; 

 wing, 3.45; tail, iMO; exposed culnien, 0.70; tarsus, 1.1*3; middle toe, 

 0.72. No. 43538: Length (skin), O.IO; (tail not grcvvn out); Aving,3.40; 

 exposed eulmen, 0.08; tarsns, l.L'5; middle toe, 0.75. 



2. Forniicaiiiis aiigiiirons Ciould. 



Formicuriiiti uii/rifronH GouLD, Ann. N. H., ser. 2, xv, May, 1855, 344 (Chami euros, 

 e. I'erii; mus. J. Gould); P. Z. ,S., 1855, 6S (Chauiicuros). — Scr.., P. Z. S., 1855, 

 145 (Bogota); 1857, 47 (Colombia; Amazouia) ; 1858, 68 (Kio Napo, c. Ecuador); 

 277 (Colombia; e. Pern); Catal., 1862, 190 (Bogota); Cat. B. Brit. Mus., xv, 

 1890, 303 (Cayenne, Brit. Guiana, Bogota, Sarayacu, e. Ecuador, Charaicuros, 

 e. Peru).— Salv., P. Z. S., 1866, 74 (c. Peru; Colombia); Ibis, 1885, 429 

 (Camacusa, Brit. Guiana).— ScL. and Salv., P. Z. S., 1873, 277 (c. Peru); Nom. 

 Neotr., 1873, 75 (Colombia; e. I'cru).— Taczax., P. Z. S., 1882, 32 (n. e. Peru); 

 Orn. du Per., ii, 1884, 77 (Yurimaguas and Cliamicuros, e. Peru). 

 Mifrmornis nigrifrons Cab. and Heixe, Mus. Ilein., ii, 1859, 7 (Cayenne). 



Forinicarius caiianensis (uec Bodd.) Pelz., Orn. Bras., 1868, 90, 168 (Rio Negro, Mari- 

 batauas, Barra Mai, and Kio liranclio). 



Hab. — Guiana to the Amazon and Colombia. 



8p. Char. — Similar to F. cajjanoisis Bodd,, but with whole forehead 

 glossy black. 



Adult male (No. 32872, IT. S. Nat. Mus., Kio Napo, e. Ecuador; E. 

 Yerreaux). — Entire forehead and lores glossy black; sides of head 

 (including narrow superciliary line), sides of neck, chin, throat, 

 chest, and breast ''dead" black; rest of under parts dark sooty gray, 

 the anal region mixed with whitish. Crown, occiput, nape, and hind 

 neck deep rufous-taw ly, paler, or more ochraceous, laterally, darker 

 (almost chestnut) on the crown, where the feathers are blackish imme- 

 diately beneatli the surface; rest of upper parts clear bister-brown, the 

 tail darker, inclining to brownish bhuik on about the terminal half; 

 outer w<?b of outermost feather of alula deep buff; primary coverts 

 wholly brownish black; basal third (approximately) of inner Avebs of 

 prinmries ochraceous-buff; smaller under wing coverts light buff, tipped 

 with blackish, the larger coverts cluetly blackish. Bill, black ; legs and 

 feet, brown. Total length (skin), 0.00; wing, 3.15; tail, 1.95; exposed 

 eulmen, 0.60; tarsus, 1.15; middle toe, 0.70. 



Yonrnj male (No. 10718,* Amazon B., Lieut. Tlerndon, U. S. N.). — Sim- 

 ilar to the adult, but forehead less extensively black, the lores and 

 suborbital region largely rusty, chin and throat white squamated with 

 black, chest dark sooty browuisli gray, rest of under i)arts lighter and 

 duller brownish gray than in adult, and upper ])arts browner (ranging 

 from clear l)ister on back to niunimy bi-own on upper tail coverts). 



Three adults from Britisli (iuiana in the collection of the .Vmei-ican 

 Museum of Natural History diil'er tVom the single exam})le from the 

 upper Amaz<tn (Itio Napo) in nnu-li laiger bill and in having a distiuct 



