236 
has studied, and of which he writes that, as it increases in size, it 
causes the dorsal scale to separate from the ventral so that the adult 
escapes from beneath the scale instead of gnawing a hole through it. 
Aphycus immaculatus n. sp. 
Male. — Length, 0-55 mm. ; expanse, 1*3 mm. ; greatest width of fore-wing, 0*21 mm. 
Antennal scape slightly widened below, pedicel nearly half as long as scape, club 
as long as three preceding funicle joints together, fimicle joint with hairs rather 
longer than length of each joint; mesoscutum with punctation longitudinal down 
Fig. 11.— Aphycus immaculatus n. sp., greatly enlarged (original). 
middle, transverse each side; metascutum with short longitudinal punctation; scap- 
ula? and visible portions of metascutum with lengthy transverse punctation. Hairs 
from third abdominal spiracles extending beyond tip of abdomen. Color uniform dark 
yellow brown, head light yellow, all legs dusky; antennae uniformly dusky yellow; 
wings hyaline. 
Described from one balsam-mounted $ reared from typical Aspidiotus 
aurantii, by D. W. Coquillett, at Los Angeles, Cal., October 11, 1887. 
THE INSECT COLLECTIONS OF THE COLUMBIAN EXPOSITION.* 
By F. H. Chittenden. 
Several accounts have appeared of the collections of insects exhib- 
ited at the World's Columbian Exposition, but, as only one of these has 
apparently made any attempt at completeness, it has been thought 
desirable to present to the readers of Insect Life, as a matter of 
record, a more complete list of these exhibits. 
The exhibit of the Division of Entomology of this Department was 
displayed in the U. S. Government Building, and as a complete cata- 
logue of it, including all except a series of eight large cases of forest 
tree insects, which was originally prepared to form part of the Forestry 
* A report made to the Entomologist of the exhibits other than that of the U.S. 
Department of Agriculture. 
