224 MAINE AGRICUI.TURAI, EXPERIMENT :TATI0N. I909. 



Larva. Slender, legless, resembling the larva of an aquatic 

 Ceratopogon, 12 segmented. Head yellowish brown, oblong, 

 about twice as long as wide ; labrum with rounded margin, 

 setose ventrally; mandibles when extended, reach cephalad of 

 margin of labrum, brown in color, apical half oval, margined 

 with a number of blunt teeth, mesal margin also with toothed 

 hook produced cephalad, maxilla fleshy, its palpus short, papil- 

 late ; hypopharynx setose ; labium with brown margin, and 

 with 2 pointed teeth on lateral cephalic margin ; a few scattered 

 setae on head ; 2 eye spots. Body hyaline, whitish, the 2 main 

 tracheal trunks open on the center of the lateral margin of the 

 first thoracic segment and extend to the apex of the twelfth 

 abdominal segment ; they are connected by a strong commis- 

 sure at the cephalic end of the second thoracic segment. At 

 the posterior end the spiracles are surrounded by a fringe of 

 setae which project out at right angles to the axis of the body. 

 Length of full grown larva about 7 mm. 



Pupa. Brown; tapering, with a few caudad projecting 

 spines from the thorax and each of the abdominal segments. 

 Length 4 mm. 



Habit. This species has been reported a number of times 

 by fruit growers as causing injury to the roots of apple and 

 I each trees. It has been found to occur in the rotting wood of 

 these trees but it is extremely doubtful if it is able to cause 

 injury to the sound wood. Both Riley and Walsh as well as 

 Glover have recorded it and all are agreed as to the inoffensive 

 character of this insect. The specimens upon which the above 

 descriptions were drawn, were sent to me by Mr. Gardiner, of 

 Gardiner, Maine. 



2. Genus Palceoplafyura Meunier. 

 Palceopiatyura Meunier, Miscell. Entomol. VII. 164. 1899. 

 Head depressed, front broad, ocelli 3 in number remote from 

 eye margin, palpi 4 jointed; antennae 2-[-i4 jointed, about as 

 long as head and thorax taken together. Thorax arched, setse 

 not prominent ; abdomen of the male with 7 visible segments ; 

 hypopygium small, consisting of a pair of 2 jointed forceps, 

 the basal joint stout, the terminal joint curved, about 4 times 

 as long as broad, the apex toothed and densely ciliated on the 

 inner side. Legs slender, tibial spurs about 1.5 times as long 



