VOL. IV. | General Bird Notes. 227 
slender black and yellow hornet was found on this date pulling 
-one of the larvz out of its case. 
The cases of this species are constructed of little leaflets of 
the mesquite, fastened together longitudinally with silk into an 
irregular, more or less tubular bag-like case, so as to protect the 
larva inside. The leaflets which compose the case are always more 
or less eaten along the midrib, but not entirely through. The 
cases bear considerable resemblance to those of Psyche confederata, 
Hanging perpendicularly from the leaves while the larve are 
feeding, they give the mesquite bushes the appearance of being 
hung with miniature bag- worms. 
Some of the larvze in their cases were sent to Dr. Packard. 
They reached him as pupze. From one of these an imago 
appeared, which Dr. Packard wrote me was ‘‘an unknown 
tineid.” I am unable therefore to suggest the genus to which it 
belongs. 
Description of larva. Uength, 9 to 12 mm.; width anteriorly, 
nearly 1% to1%4 mm. White; head black, somewhat polished, 
with a slight reddish area on each side dorsad of eyes; protho- 
racic segment with dorsum brownish black, except a median 
longitudinal whitish dividing line. Consisting of thirteen seg-_ 
ments; appearing from above as though possessing two extra 
ones, since the two terminal segments each bear a transverse 
suture or wrinkle on dorsum. Head and prothorax about equal 
in width; third segment distinctly wider, segments 4 to 6 nearly 
same width as 3, 7 and 8 very gradually narrowing, 9 to 11 
about or hardly as wide as 8, 12 and 13 gradually narrowing 
from 11, 13th segment a little more than one-third width 
of 3d. Head usually not retracted, a little wider than long; 
prothoracic and third segments a little shorter than head, 4 
about as long as head, 5 slightly longer, 6 and g to 11 a little 
longer than 5; 7, 8, 12 and 13 about as long as 5. Head and 
prothorax chitinous, rest fleshy. Head subhemispherical, con- 
vex dorsally, with a few fine hairs on anterior border, and 
several on dorsum; all the other segments with a number of 
hairs fabout ten) arising from minute papille, four usually 
being dorsal, the others lateral and ventral. Eyes con- 
sisting of six small but prominent bead-like glassy 
