schaeffer: donaciini of the new world. 8 1 
is occasionally, especially in some smaller specimens, equal in length 
to the first joint. The apices of elytra are squarely truncate, but speci- 
mens occur, though very rarely, with apices emarginate. 
D. proxima is closely related to this species and remarks and com- 
parisons will be found under the description of that species. 
Several forms or varieties are separated, which, from a study of a 
large amount of material, are entitled to recognition, though one of them 
is rather weak and apparently only the extreme southern form of the 
variable typical insect. 
var. TRYPHERA new var. 
Like typical cincticornis in form and coloration, but slightly narrower, 
prothorax smoother, more even and very often, especially in females, 
rather wider, the lateral tubercles generally feeble and nearly obliterated. 
The color of upper surface is very frequently entirely dark blue, occa- 
sionally metallic green or golden. The hind tibiae of the males are 
always distinctly tuberculate internally. Length: 4.5-7 mm. 
Type, male, and allotype, female, in the Museum collection. 
New Jersey: Lakehurst, July (Engelhardt, Schott); Cape May Pt., 
June (Wenzel); Centerton (Liebeck). 
South Carolina: Swansea, August (Knab). 
Tennessee: Walnutlog, July (McAtee). 
Alabama: Mobile, June (Loding). 
Florida: Jupiter (Castle); Enterprise, April (Dietz) ; Lake Worth, 
April (Mrs. A. Bryan in Brit. Museum coll.). 
Texas: "Tex." (Leng coll.). 
Arkansas: Big Lake, June (McAtee). 
Mexico: Toxpam (Salle). 
Guatemala: Livingston (Schwarz in coll. Nat. Museum). 
As indicated in the remarks above this is by no means a clearly 
defined variety. Specimens from southern New Jersey or further south 
with smoother, more even, wider prothorax and entirely dark blue, 
metallic green or golden surface color, look distinct enough from the 
typical form but there are also specimens from the same localities which 
are doubtful to place. Some specimens are very close to the Cuban form, 
antillanim, and are apt to be confused with it and it is mainly for this 
reason that I have given the southern specimens a name. Through the 
kindness of Mr. Arrow I have seen one of the Mexican specimens recorded 
by Jacoby in the Biologia as cincticornis. The specimen from Guatemala 
agrees with this except that the third antennal joint is slightly longer. 
They agree best with tryphera, though differing slightly. 
