866 CHAKLES 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 longitudinal row and the scattered 

 discal tubercles, a bare space, at anterior end of which is a large, stout, setiferous tubercle; 

 a subterminal transverse row of about fifteen acute black spines; on terminal segments the 

 lateral longitudinal rows interrupted, or, en 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. 



Nepionotijpe. Orono, Maine, July 19, 1913. 

 Neanotype. With type larva, July 17, 1913. 



Paratypes. Larvae, with type larva, June 13 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 



