[September 1882. BULLETIN BROOKLYN ENTOM. SOC. VOL. V. 33 
Biological notes on, and Description of the larva of 
Calosoma calidum, Fw. 
By F. G. Scuauprr. 
July 5th I found a large carabidous larva in the ground entirely 
black. It was very fierce and active, biting very hard. I fed it with pu- 
pee of Ceruchus piceus, which I found plentifully ina beech stump, it 
devoured daily about two. At one instance it devoured at one sitting the. 
whole contents of a large pupa of Smerinthus excaecatus. 
From July 14th till July 17th it was entirely motionless and trans- 
formed into pupa the latter day. Gradually it became dark, and July 25 
the imago developed all white, except the above named parts which as well 
as the trochanters were black. 
From 6 to 9 o'clock a. m, it became of full color. 
Length of full grown larva 40 mm; form linear. 
Color entirely black, shining. 
Head vounded, somewhat broader than long, anterior angles small 
rectangular, hind angles rounded, clypeus sulcate at middle, carinate in 
front. 
Ocelli six placed at the margin behind the antennz, distant from 
each other. ; 
Antenne four-jointed, arising near the base of the mandibles and just 
as long as those, first joint stout, somewhat club-shaped, second twice as 
long, truncate at tip, third as long as the first, fourth half as long and 
slender. 
Mandibles very long and broad with blunt tip, slightly arcuate with a 
very large broad blunt tooth situated near the base, and a small straight 
slender brush. 
Maxilla with palpus as long as the antennz, but much farther pro- 
jecting; the last antennal joint scarcely reaches the tip of the mandibles, 
while almost three joints of the maxillar palpi project farther. Basal joint 
of maxilla short, second five times longer, a little broader at apex clothed 
with dense bristles, especially at the inner side, supporting a four-jointed 
palpus, a two jointed lobe and a small lobe-like process. The palpal 
joints are very short and stout, the fourth oblong oval and the longest; 
the lobes scarcely half as stout as the palpi, the two joints nearly equally 
long, and both together as long as the three first palpal joints; ihe pro- 
cess arises near the inner base of the lobe, is very slender and one-third 
the length of a lobal joint, set with bristles at tip. 
