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1878.] 41 í [LeConte. 
107. Spharoderma opima, n. sp.—Rounded, nearly circular, con- 
vex, piceous-black, shining; antenne and legs (except hind femora) dark- 
brown. Head punctured, eyes not immersed in the prothorax. Prothorax 
short, sides oblique, front angles rounded ; surface finely punctulate. Elytra 
with irregular rows of sparse, coarse punctures, interspaces nearly smooth. 
Length 2.5 mm.; .10 inch. 
North Carolina and Texas. I have adopted the manuseript 
specific rame given by Dr. Zimmermann. This is the first 
introduction of the genus into the literature of our fauna ; 
Spheroderma insolita Mels. isthe type of Cerataltica Crotch, 
and belongs in another group. 
108. Chzetocnema pinguis, n. sp. — Sub-ovate, convex, more 
pointed behind ; coppery bronze, not very shining, base of antennse, tibie 
and tarsi testaceous. Prothorax finely alutaceous, transverse, not narrowed 
in front, sides rounded near the front angles ; disc finely punctured. Elytra 
with fine punctured stria, interspaces flat, smooth. Sides of last ventral 
segment finely punctured. Length 2.2 mm.; .09 inch. 
Enterprise and New Smyrna, two specimens. Very like 
C. denticulata, but more pointed behind; the seulpture is 
much finer and the last ventral segment is not coarsely and 
sparsely punetured, but is nearly smooth at the middle and 
finely punctured towards the sides. 
109. Chaetocnema protensa, n. sp. —Very elongate-oval, moder- 
ately convex, coppery bronze, not very shining ; antenne black bronzed, 
tibie and tarsi brown. Head strongly and sparsely, front more densely 
punctured. Prothorax transverse, not narrowed in front, rounded on the 
sides, punctured. Elytra with stris] composed of large punctures, inter- 
spaces flat, smooth, ventral segments sparsely punctured. Length 2.8 mm. : 
.11 inch. 
Detroit, Michigan; one specimen ; Messrs. Hubbard and 
Schwarz. Much larger than C. elongatula Crotch, but of 
equally elongate form. y €x bei 
110. Chaetocnema cylindrica, n. sp.—Elongate, sub-cylindrical, 
convex, coppery bronze, not very shining : antenne and legs of the same 
color. Head and prothorax strongly, rather closely punctured, the latter 
transverse, not narrowed in front, rounded on the sides. Elytra a little 
wider than the prothorax, strie composed of deeply impressed punctures, 
interspaces smooth. Ventral segments rather finely punctured. Length 
2 mm.; .08 inch. 
Detroit, Michigan ; Messrs. Hubbard and Schwarz. Also 
found in Massachusetts. The punctures of the short seutel- 
PROC. AMER. PHILOS. SOC. XVII. 101. 27. PRINTED APRIL 22, 1878. 

