156 Psyche [August 
2 91 @ Stephansort, 1 o Milne Bay, Br. N. Guinea. Length, 11 mm. 
Type: Q Stephansort (coll. Bowditch). 
Head faintly and sparingly punctulate with a dark median line, antenne reach- 
ing the middle of the body the scape wholly and second joint partly flavous, thorax 
shining, impressed on either side of the disk, moderately and unevenly punctulate, 
obsolete at the sides, which are rounded and slightly reflexed, anterior angles 
rounded, posterior obtuse, scutel obtusely pointed behind, elytra shining, rather 
more strongly punctulate, near the base, punctures becoming obsolete and fine as 
they enter the black space, sutural margin thickened near the apex, entire under- 
side dirty flavous; two of the specimens were in the 2d Jacoby coll. under the name 
dimidiatum Blanch. but the size, shape and metasternal process separate it at once. 
Oides femoratus sp. nov. » 
Smooth, convex, flavous, antennz, most of the head, under side of the body largely 
and legs, except the basal two thirds of the femora black, scutellum and margin of 
the suture fuscous, ¢’ with metasternum produced into a well marked obtuse 
process. 
Type: & Cooktown (Austral.) (square dark blue paper label) 2 spec. (unnamed 
in 2d Jacoby coll.) (coll. Bowditch). Length, 9 mm. 
Head with a few fine punctures and impressed line on the front like confusus 
(vide supra), mouth yellow, antenne reaching the middle of body, the scape more 
or less rufous, thorax smooth, shining, faintly impressed on the disk, very faintly 
punctulate, anterior angles rounded, posterior obtuse, sides margined and faintly 
explanate, scutellum large very obtusely rounded at apex, elytra convex, every- 
where faintly and evenly punctulate, the extreme sutural edge thickened, under 
side mostly shining black, with the pro and mesothorax somewhat flavous, and 
coxze and trochanters more or less yellow, legs black except the basal two thirds of 
the femora; the color of the legs and the metosternal process (which is black) easily 
distinguish this form, the upper color makes the species resemble sutwralis Jac. 
from New Guinea. 
SOME COMMENTS ON THE VALUE OF WARNING 
COLORS AND MIMICRY IN INSECTS. 
By C. H. Ricuarpson, 
New Jersey Agricultural Experiment Station, New Brunswick, N. J. 
During the course of an extended field trip through Nevada and 
eastern California several years ago, I had an opportunity to make 
some observations on the feeding habits of certain amphibians 
and reptiles. As several of these observations throw light upon 
the protective value of warning colors and mimicry in insects, 
they are given in the hope that they will be a real contribution, 
even though a meager one, to these disputed questions. 
In the region about Pyramid Lake, Nev., the fleet-footed grid- 
iron-tailed lizard (Callisaurus ventralis Hallowell) was very abun- 
