20 
Psyche 
[ March 
gles rectangular with rounded vertices ; thickened side mar- 
gins slightly wider and better defined than in purpuratus. 
Elytral intervals distinctly alternating in convexity, the 
summits of the more convex intervals narrowly blackish 
and slightly shining. In purpuratus the discal intervals 
are of uniform convexity ; the seventh is cariniform in both 
species. 
Length 22 to 25 mm. ; width 9 to 10 mm. 
A good series of specimens is before me, all taken at 
Homestead, Florida, in June 1928 and '29 by Mr. P. S. 
Darlington, Jr., to whom I take pleasure in dedicating 
the species. The type, a $ , and several paratypes remain 
in my own collection, several paratypes also in Mr. Dar- 
lington's collection. 
Although most nearly like purpuratus in general facies, 
in the character of the elytral intervals this species agrees 
more nearly with quadratus, to which it would be traced 
in Horn's table of the genus (Bull. Brook. Ent. Soc. 1880, 
p. 51). Quadratus is however an evidently more robust 
species, the prothorax relatively larger with sides more 
nearly continuous with those of the elytra, giving a dis- 
tinctly more oval outline. In the few specimens seen the 
violaceous surface tint is less developed than in darlingtoni. 
The tendency toward a greater development of the head 
in the female is also observable in my series of D. splendi- 
dus, and suggests that Casey’s D. speciosus , said to closely 
resemble splendidus except for its smaller head, is really 
that species. The fact that Casey's specimens were all 
males is confirmative evidence. 
