Tue CrRANE-Fiures or New York — Part II ea7Gil 
form a complete but much-branched lateral trachea. The branches are 
very diffuse and abundant and the skin is well supplied. As already 
stated, the cross-commissures are very delicate and are unbranched or 
nearly so, the dorsal regions of the body being supplied by branches from 
the lateral supply. 
The conditior of the tracheae in Antocha, the only apneustic crane-fly 
larva among the species here considered, may be outlined as follows: 
The usual two principal trunks are present, joined across on each 
segment by delicate cross-commissures which send off two approximated 
branches except on the eighth segment. Laterad and ventrad of the 
principal trunks are the delicate lateral tracheae. These are joined to 
the main trunks by fine branches inserted about midway between the 
dorsal commissures, toward the posterior end of the body lying nearer 
the posterior commissure than the anterior one. 
At the ninth segment each trunk sends off a branch from its proximal 
side, these branches being connected by a long commissure and supplying 
the posterior pair of gills. ‘The commissure is about as long as that part 
of the branch between it and the trunk. Immediately caudad of, or 
just at, the fork, but on the ventral side, a subequal branch passes into 
the anterior gills; at the same point the delicate lateral tracheal trunk 
finally ends in the main trunk. Caudad of this triple forking the main 
trunk gradually widens out into a cylindrical structure which is truncated 
apically, at. the tip passing out into two small elongate branches, near 
the base with about three delicate branches, two being dorsal in position 
and one more lateral. All of these tracheae, to the gills and to the caudal 
lobes, send off many branched capillaries at frequent intervals, and the 
caudal lobes unquestionably function as tracheal gills. 
A comparison of Antocha with Dicranota as described and figured 
by Miall (1893: 245-248) shows, in the latter, distinct spiracles and the 
gills similar but much smaller. The tracheal arrangement differs in that 
a single branch on either side supplies both gills of that side, while the 
caudal lobes are tracheated by a branch that leaves the main trunk close 
to the spiracles. (Plate XII, 2 and 3.) 
The arrangement of the tracheae at the base of the wing pad is described 
and figured for Bittacomorpha by Dr. Chapman in Comstock’s The 
Wings of Insects (1918 : 36-37). 
