227 
building, but they were all domestic aud not known to affect woody 
plants. 
Silvanus advena Waltl., previously treated as No. 6 in the list of grain insects, was. 
noticed in the Forestry Building. 
Lwmophlceus sp. — An undetermined species not known to inhabit North America,, 
and from its habitus evidently subcortical. 
Lathridius minutus L. — Previously mentioned under No. 18. 
Coninomns carinatus Gyll. — Probably introduced. Commonly found in old flour 
barrels. This species might more appropriately have been placed with the grain 
insects, but its occurrence was noted only in the Forestry Building. 
Corticaria fenestralis L. (deleta Mann.). — A common and well distributed species. 
Melanopliila longipes Say. — Well known and widely diffused in the North, where it 
infests pines and other conifers. 
Agrilus sp. — An exotic Buprestid resembling scltulus Horn, and possibly from 
Mexico or Central America. It probably infests deciduous trees. 
Cerambycid — A number of examples of a large Cerambycid or long-horned beetle 
of a genus unknown in North America, bred out from a stump of Charisia insignis, a 
Malvaceous tree from Argentine Republic. The stump was without bark and the 
wood was completely ruined by past generations of this species. In their exit the 
beetles had bored through several large photographs that were attached to the 
stump. 
Platypus compositus Say (?). — A native species of Scolytidte restricted to the Coni- 
fer 3d. 
Xyleborus affinis Eichh. was bred from a part of the trunk of a leguminous tree, 
Erithrina cristigalli, in the section of the Argentine Republic. 
Tomicus cacographus Lee. — A common native species, also a Scolytid, depredating 
on pine and other conifers. 
Phlceotribus frontalis 01. — Very abundant in the Forestry Building. It is a com- 
mon species affecting Mulberry and Hackberry. 
Hylesinus aculeatus Sav. — A well-known American species, attacking ash. 
THE HYMENOPTEROUS PARASITES OF THE CALIFORNIA RED 
SCALE. 
By L. O. Howard. 
In none of the numerous habitats of the now wide-spread Aspidiotus 
aarantii have true hymenopterous parasites been found except in Cali- 
fornia. Mr. D. W. Coquillett, in the course of several years' careful 
study of the insect at Los Angeles in his capacity as field agent of the 
Division of Entomology, has reared several parasites which he has sent 
on to Washington from time to time for study. All have been desig- 
nated to him by their generic names, but none have heretofore been 
thoroughly studied for descriptive purposes. Sufficient material has 
now been reared by Mr. Coquillett to warrant the technical character- 
ization of the species, and this paper has therefore been prepared at 
Prof. Riley's suggestion. 
There are, in Mr. Coquillett's material, six distinct species which are 
undoubted parasites of the Red Scale. Mr. Coquillett also sent in, in 
