866 CHARLES PauL ALEXANDER 
two other setae caudad of -spiracle; at caudal margin a solitary seta close to ventral margin. 
Sternum with scattered slender tubercles, on segment 3 these appearing as a longitudinal row 
of about ten alongside the hind legs; between this lateral longitudinai row and the scattered 
discal tubercles, a bare space, at’ anterior end of which isa large, stout, setiferous tubercle; 
a subterminal transverse row of about fifteen acute black spines; on terminal segments the 
lateral longitudinal rows interrupted, or, on the seventh segment, lacking, on seventh segment 
the subterminal armature of both dorsum and sternum more powerful, especially the inter- 
mediate spines of sternum, which are very large; numerous setae scattered along rows. 
Segments 3 to 8 on ventral surface of posterior ring with a circular disklike area, median 
in position and at about two-thirds length of ring. (In some specimens, especially females, 
the discal tubercles on the posterior ring are much smaller and lie in longitudinal rows.) 
Male cauda (Plate XLV, 211) with tergal valves slender, elongate, slightly divergent, taper- 
ing to the acute tips, which bear a small subterminal seta; sternal valves short, blunt, with 
a flattened oval lobe between valves of sternum; eighth segment on dorsum with a trapezoid 
of four very long, slender, pointed lobes, which are provided with delicate hairs,-the posterior 
pair of lobes longer, stouter, and lying closer together; just above anterior pair of lobes a 
blunt setiferous tubercle; pleural region of segment 8 with two spines; a small seta cephalad 
of these spines; sternal region of segment 8 with two widely separated setiferous tubercles. 
Female cauda (Plate XLV, 212) with tergal valves elongate, narrowed at tips, and armed 
with sharp, black spines; a few small setae before tips; sternal valves short, blunt, narrowed 
at tips. 
Nepionotype.— Orono, Maine, July 19, 1913. 
Neanotype.— With type larva, July 17, 1913. 
Paratypes.— Larvae, with type larva, June 15 to July 27,1913. Pupae, June 9 to July 22, 
1913. 
(Subgenus Phylidorea Bigot) 
1854 Phylidorea Bigot. Ann. Soc. Ent. France, p. 456. 
The immature stages of the type species of Phylidorea, Limnophila 
(Phylidorea) ferruginea (Meig.), were described by De Meijere (1916: 
204-206). In Holland, larvae were found in April on the banks of a ditch, 
where they were living between decaying leaves. The larvae are cylin- 
drical, and are from brownish yellow to brown in color. The antennae 
are described as three-segmented, the apical papilla being considered 
as a segment. The labrum bears on the epipharyngeal surface a median 
projection provided with two conspicuous biarticulate lobes. The outer 
lobes of the maxillae project as flattened blades. The mandibles are 
powerful and strongly curved, and have a group of small lateral teeth 
at about midlength. 
The pupa is about 10 millimeters long and is blackish brown in color. 
The pronotal breathing horns are almost semicircular and are yellowish: 
