Hagen.] 244 [October 23, 
Acanthaclisis occitanica), and one by Mr. Emerton (Myrmeleon im- 
maculatum). Of the-two species of Palpares, and one of Myrme- 
caelurus, short notices are given by Brauer. Percheron, in his de- 
scription of Pulpares libelluloides, has confounded two species to- 
gether, P. libelluloides and A. occitanica. ‘The latter species is also 
shortly noticed by Leon Dufour and Perris. A doubtful notice of 
Palpares Hispanus is given by Rosenhauer. J have noticed twenty- 
one species, nineteen before me, belonging to nine genera. 
Of the thirty-seven species described in both groups, fifteen be- 
long to Europe, five to Asia, one to Australia,three to Africa, thir- 
teen to America, four of them, all Myrmeleonina, to the United 
States. 
The larve of the two groups are easily separated from all others 
by their more flattened, broad body; larger head; mandibles inside 
with strong teeth, three in number (only in two cases four or one); 
by more or less elongated lobes on the sides of the thorax and abdo- 
men, often provided with hair pencils; by the presence of seven 
eyes, one always on the underside; by short and minute antenne; by ~ 
the labium divided in two lobes; and by the hind legs, having the 
tibia and tarsus united without articulation. The two latter charac- 
ters have been entirely overlooked, and the latter is, so far as I know, 
not to be found in any other genus of the Hemerobina. 
On the whole, the Myrmeleonina are more uniform and alike than 
the Ascalaphina. Besides the prothoracic stigma, there is on the 
first eight sezments of the abdomen on each side a stigma, the first 
pair on the dorsum, the others on the sides of the segment. 
In the Ascalaphina we find either all eight on the ventral side, or 
the first, or the two first, placed above. The side: lobes are gener- 
ally longer on the Ascalaphina, varying between two or one on each 
side of the segment. In the Myrmeleonina there are generally tuber- 
cles, provided, more or less; with bristles, recalling the locomotive 
organs of the Annulata. The’ last segment of the abdomen is elon- 
gated cylindrical in all Ascalaphina; short, and provided with dif- 
ferent kinds of spines in the Myrmeleonina; but one genus of the 
latter, Dendroleon, repeats the form of the Ascalaphina. Concerning 
the habits of these insects, the remarkable fact of the ant-lions mak- 
ing pit-falls or funnels in the sand to catch their prey, was well 
known centuries ago. It is far more interesting that this manner of 
living considered long ago as belonging to all species, was proved by 
Brauer to be only an exception, perhaps only occurring in the genus 
Myrmeleon. Indeed, only four species, two of Europe, two of the 
