148 THrE CANADIAN ENTOMOLOGIST 



By the middle and last of October, all sizes of larvae except small ones can be 

 found on the roots. Some are apparently full grown at this time. They are best 

 located by taking the top soil off and exposing the upper surfaces of the root 

 stocks. After the stocks have been followed out and laid bare for several feet 

 from the base of the plant, they should be cut in section's and carefully lifted 

 up. \\'hen larvae are present, they will be found in the soil directly under the 

 injured portions of the roots. Most of the larvae are found feeding on the 

 lower surface of the root stock from four to twelve inches away from the base 

 of the plant. Irregular, longitudinal channels are eaten in the lower side of the 

 root, everything except the central woody portion being consumed. Sometimes 

 the channels extend part way on the upper root surface. From the fact that 

 diggings made as late as November revealed full and partly grown larvae, it 

 appears that pupation takes place in the spring or early summer. 

 Egg.. Length 1.5 mm. Greatest width, 0.58 mm. Whitish, elongate, sub- 

 elliptical, sides slightly arcuate ; obtusely rounded at both ends, one end slightly 

 broader than the other; chorion apparently smooth. 



Pull Grozvn Larva. Length about 12 mm. Width about 3.5 mm. Form 

 cylindrical, slightly curved, lightly chitinized, creamy white. Head subcircular, 

 flat, depressed; collum absent; occipital foramen subtriangular ; epicranial halves 

 separated dorsally by a faint median suture ; front flat ; gula indistinct, mem- 

 braneous ; ventral mouth parts fleshy and slightly retracted ; maxillary sclerite 

 absent; clypeus narrow, transverse; labrum oval, anterior edge arcuate and 

 bearing several minute hairs; antennae laterally inserted, two jointed, supple- 

 mentary joint not as wide but almost as long as apical joint; ocelli absent; 

 mandibles biting type without molar structure, bifid at apex; maxilla fused with 

 labium to near its apex; maxillary palpi four jointed including palpifer; lacinia 

 inserted below palpifer, short, finger-shaped, rounded at apex, bearing several 

 chitinous hairs on apex and inner surface ; galea absent ; cardo triangular, of 

 one piece, chitinized ; labium with mentum and submentum fused and indistinct ; 

 labial stipes ring-like, labial palpi one jointed. Protergum twice as wide as 

 long bearing lightly chitinized plate. Meso and metatergum each bearing three 

 hair bearing processes. Pre and postepipleuron well developed, Ijoth bearing 

 setose lobes. Hypopleural chitinizations of thorax faintly indicated. Coxae 

 widely separated. Legs weak, slender, bearing several hairs, five-jointed, tarsus 

 long, slender, claw-like. Epipleura and hypopleura slightly produced bearing 

 setose lobes. Abdominal segments transversely ridged dorsally. each ridge 

 bearing a row of hairs ; coxal lobe with pronounced ambulatory tubercles with 

 long setae ; ninth abdominal segment without cerci ; tenth segment terminal, 

 wart-like, composed of three anal lobes, two lateral, chitinized and one dorsal ; 

 anal opening longitudinal; median ventral portion of each abdominal segment 

 bearing numerous minute hairs. Spiracles annuliform. thoracic on anterior 

 margin of mesothorax. 



The adult was described by Fabricius in 1775 (Ent. Syst. 101) and later 

 mentioned in various lists and publications. 



Lasioptera apocyiii Felt (Dip.) 

 At New Brunswick, N.J., on August 1. numerous oval, depressed stem dis- 



colorations were observed in a patch of dogbane. Closer observation showed 



