478 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
organs indicates that they were much shorter than in Plectrotetra. 
The left antenna of the fossil (supposing the insect to be in its natural 
position instead of upon its back) is taken to show the true structure, 
the other being very evidently distorted. The courses of the elytral — 
striae, as they show through, are indicated on the figure by dotted lines 
except in a few places where the punctuation is set up strongly so as 
to allow of the delineation of the separate points with a camera lucida. 
The specific name is given for the late Dr. Hermann A. Hagen, for 
many years in charge of the entomological department of the Mu- 
seum of Comparative Zodlogy. ; 
PROCHAETOCNEMA, gen. nov. 
Form similar to that of the recent genus Chaetocnema, particularly 
the shorter species like C. confinis. Head large, antennae slightly thick- 
ened, 11-jointed, decidedly less than half as long as the body. Front 
coxae well separated by the strongly punctate prosternum, which is 
expanded at tip. Middle and hind coxae well separated, intercoxal 
process of first ventral blunt at tip. Ventral segments, as preserved, 
very unequal, the first extremely long, the three following short, the 
last nearly as long as the first. Hind femur much thickened, posterior 
tibia long, expanded apically and with a notch before the tip. 
Type.— P. florissantella, sp. nov. 
PROCHAETOCNEMA FLORISSANTELLA, Sp. Nov. 
Plate 12, fig. 3. 
Form robust. Head moderately large; antennae shorter and 
thicker than in the recent species of Halticini with which I have been 
able to compare it, joints beyond the first subequal. Prosternum 
moderately broad between the coxae and expanded at tip behind 
them, strongly punctured. Meso- and metasternal regions more 
finely punctate. Abdomen moderately strongly punctured at base, 
less so apically, an arcuate row behind each posterior coxa. Hind leg 
stout, the tibia strongly expanded apically, grooved on one face. 
Elytra punctatostriate, probably strongly, since the sculpture shows 
fairly well near the margin where it is usually more or less obscured if 
weak. Length, in somewhat bent attitude as preserved, 2.35 mm., 
in life probably not far from 2.50 mm. 
