INEZ 
56 BANGS — CHIRIQUI BIRDS [ a be 
MEASUREMENTS (in millimeters). 
Sex Exposed 
No and age Wing Tail Tarsus cul men 
8640 & ad. 56.0 30.0 25.0 15.5 
8641 & ad. 56.5 29.0 24.5 Was 
8642 6 ad. 57-0 30.5 24.5 jis iS 
8646 & ad. 5735 32.0 24.0 16.0 
8647 @ ad. G25 26.0 22. 14.5 
8648 @ ad. 54.0 27.0 24.0 15.0 
8649 © ad. 55-0 30.0 24.0 14.5 
8650 ? ad. 52.5 26.5 23.5 15.0 
Remarks. — Henicorhina collina is very different from any gray- 
breasted wood wren yet named, its deep gray breast, banded belly 
and striped throat at once distinguishing it. 
Costa Rica specimens are similar, but all the characters given 
above are less strongly marked in the specimens I have seen, and 
this form also is perhaps a distinct one. /Z. co//ina hardly needs 
comparison with /7. /eucophrys of South America. 
Microcerculus acentetus! sp. nov. 
Three adult males, Boquete, 4000 to 5000 feet, March and 
April. 
Type, from Boquete, southern slope of Volcan de Chiriqui, 5000 feet alti- 
tude, g adult, no. 8651, coll. of E. A. and O. Bangs, collected April 18, 
1901, by W. W. Brown, Jr. 
Characters. — Apparently a very different species from any heretofore 
described. All the colors very dark; no cross-banding whatever on under 
parts or back, the crown alone with slight dusky tips to the feathers, pro- 
ducing a scaly appearance. 
Color.— Upper parts deep, rich burnt umber, without a trace of cross-bar- 
ring ; top of head duller, about mummy brown, the feathers very slightly 
tipped with dusky, producing a scaly appearance ; upper tail coverts blackish, 
edged with dark burnt umber; sides of head, breast and middle of belly dull 
drab gray slightly washed with burnt umber; throat dull grayish white; lower 
sides, flanks and under tail coverts dark burnt umber, wholly unbarred; wing 
and tail blackish brown; wing coverts and tertials margined with same color 
as back. 
1 A centetus — without spots or points. 
