266 
[October 
has two excessively robust superior appendages, incurred so that their 
extreme tip points backwards, with a rudimental intermediate append¬ 
age, and two excessively robust straight inferiors half as long as the 
superiors, basally confluent with them, and occupying the entire ventral 
surface. It is several weeks before the imago of Corydalis emerges, 
which is nocturnal in its flight, as is also that of Chauliodes, and dull 
and sluggish in its motions.* It is greedily devoured by birds and do¬ 
mestic fowls, as is also the larva whenever they can meet with it. The 
eggs are deposited in patches, as I am told, upon any substance overhang¬ 
ing the water. This insect occurs both on the Mississippi and on Rock 
River, but most abundantly in those localities where there is a rocky 
bottom. I have never met with it in the larva state more than a hun¬ 
dred yards from the water. 
Note 29, p. 182. Mantispa brunnea Say. I do not possess this 
species, but I have taken near Rock Island a single pair of the rare 
M. iriterrupta Say, wliich is stated by Mr. Uhler to exhibit the same 
“tarsal lobes” as the other species. On the closest examination I can 
detect no traces of any lobes on the tarsi, except the two lobes of the 
large pad or onychium under the tarsal claws of the 4 hind feet, which 
lobes are alike in both sexes and obvious on every tarsus, exhibiting in 
several of them both S and 9 a slight appearance beneath of pale hya¬ 
line membrane. The “quadrate fuscous spot” on the wings of M. in- 
terrupta^ spoken of by Mr. Say, is represented in both my specimens by 
a ferruginous bordering of one of the cross-veins springing from the 
costa, and the costa in my specimen is bright ferruginous as Say de¬ 
scribes it, not “ fuscous,” as it is described in the Synopsis. Is not 
Dr. Hagen’s insect a distinct species? It disagrees with Say’s descrip¬ 
tion in many respects. Mine agrees exactly, except in the color of the 
“quadrate spot” above referred to. 
Since the above was in the hands of the printer, I have learnt from 
Mr. Uhler that his remarks in the Synopsis refer to the plantulse 
{onychia) not to the appendages described by Dr. Hagen, which, at 
Mr. E. T. Cresson informs me that‘‘he collected a large number of % Chau¬ 
liodes serricornis? Say on the wing about 10 or 11 A. M. on a clear, warm day in 
June.” Myrmeleon is generally said to be nocturnal in its flight, but the only 
two pairs I ever took {M. salvus Hag.) occurred on the wing in broad daylight. 
