DESCRIPTION OF TWO APPARENTLY NEW FLYCATCHERS FROM 
COSTA RICA. 
BY 
GEORGE K. CHERRIE. 
Ornithologist, Museo Nactonal de Costa Rica. 
A single specimen before me seems to be intermediate in many char- 
acters between the genera Mionectes and Leptopogon as defined by Sal- 
vin and Godman in their Biologia Centrali-Americana. But from the 
rather close general resemblance (of the lower parts especially) to Mio- 
nectes assimilis, and the very small feeble rictal bristles, it is probably 
best placed with Jionectes.* 
The third, fourth, and fifth primaries are longest and nearly equal; 
second equal to the sixth; first shorter than the longest secondaries. 
For this apparently new Flycatcher I propose the name 
Mionectes semischistaceus sp. nov. 
Type: Adult female (No. 6432, Museo Nacional de Costa Rica, Guaya- 
bal, Costa Rica, February 24, 1891; C. F. Underwood). Above, whole 
head, neck, and upper back, including scapulars and lesser wing-coverts, 
slate-gray, perhaps a little darker on the head; lower back, rump, and 
upper tail-coverts deep olive-green, the transition from the slate-gray to 
the olive-green rather abrupt. Wings and tail blackish or dusky edged 
with olive-green, that on the wings having a slightly yellowish or ochra- 
ceous shade. Below, chin, upper throat, and sides of head slate-gray, 
ligher than the back; breast olive-greenish, with a decided shading of 
orange-ochraceous, the latter color deepening and the former fading and 
disappearing posteriorly on the sides, belly, and crissum; the center of 
the abdomen is almost clear ocher-yellow. Under wing-coverts orange- 
ochraceous. 
Length (skin), 5.06”; wing, 2.35”; tail, 2.13’; tarsus 0.60’; gonys, 0.26”; 
width of bill at nostrils, 0.20’; the maxilla is broken away close to the 
nostrils. ° 
The only species of Leptopogon or Mionectes with which I have had 
opportunity to compare directly are L. pileatus, M. assimilis and M. oli- 
vaceus. 
*Without doubt correctly referred to Mionectes, and a very distinct species.—R. R. 
tNo. 124616, U. S. National Museum, by the courtesy of the Costa Rica National 
Museum. 
Proceedings National Museum, Vol. XV—No. 888. 7 
