ne 
INSECT ENEMIES OF EASTERN FORESTS 
545 
KEY TO THE LARVAE OF SOME OF THE MORE IMPORTANT SPECIES OF SAWFLIES 
4. 
AND HORNTAILS THAT ATTACK TREES AND SHRUBS—Continued 
Arborvitae or juniper—Head light brown; eyes and legs black; body 
dull green with 3 dark stripes. June—July_________/ Monoctenus 
melliceps (Cress.), p. 550. 
Balsam fir—Head and outer sides of legs black; body dull green 
above, lighter beneath, and marked with 6 dark stripes. Gre- 
garious. June—August_______1 Jeodiprion abietis (Harr.), p. 551. 
Larch—Head and legs black; body dull grayish green on dorsum, 
paler beneath. Gregarious. June—-September__________ Pristi- 
phora ertchsonii (Htg.), p. 573. 
Spruce— Dark green with 5 white lines when nearly full-grown; last 
instar and newly hatched larvae without white lines. Solitary. 
ate*May—July and late July—talle=s 2 Sn ee Diprion 
hercyniae (Htg.), p. 559. 
Spruce—Head brown; body dark yellowish green above, lighter 
beneath, and marked with gray-green stripes. Gregarious. 
jlivhaveveare dirty eee ees oe eed Pikonema alaskensis (Roh.), p. 575. 
Spruce—Green-headed spruce sawfly; head and body green 
Pikonema dimmockii (Cress.), p. 575. 
Spruce—Similar to N. abietis on balsam fir____________ Neodiprion 
sp. near abzetivs (Harr.), p. 551. 
Body yellowish green with double black stripe on dorsum, and the 
sides mottled with yellow and black. White pine and softer 
2-needled pines. May—October___Diprion simile (Htg.), p. 557. 
Body yellowish white with 4 rows of black spots. White pine 
preferred. May—October___Neodiprion pinetum (Nort.), p. 553. 
Body grayish green with light dorsal line and 2 lateral whitish lines 
bordering a dark-green or blackish stripe, which has a tendeney 
to break up into spots; anal segment black above. Red, Scotch, 
Japanese red, jack, Swiss mountain, and mugho pines. May- 
June wee oe ee Neodi prion:sertiujer (Geott.), peoo4. 
Body yellowish green with a dull biackish stripe on each side of the 
dorsum, below which is a broken line of more or less distinct black 
spots, often those on middle segments obsolete; 2 large blackish 
spots on anal segment. Jack, pitch, and other hard pines 
INT siiy xpd TAC es ages Se a) Neodiprion dyari (Roh.), p. 555. 
Similar to and possibly the same as N. dyari. Jack pine. May-— 
aN Cre ettew on ha i Neodiprion banksianae (Roh.), p. 556. 
Body dull grayish green to blackish above, greenish white beneath; 
light-green dorsal stripe and fainter one on each side, also a dull- 
blackish stripe at base of legs. Red pine preferred; aiso on jack, 
Japanese red, and mugho pines. May—June___-____-/ Neodiprion 
nanulus Sched}, p. 5538. 
Body pale green with 2 longitudinal dark grayish-green stripes on 
dorsum and a row of black spots above the spiracles on each side. 
Loblolly and shortleaf pines. May—June_____----_--/ Neodiprion 
americanum (Leach), p. 551. 
Body yeilowish with 6 rows of irregular black spots. Red, pitch, 
jack, and other hard pines. May—October__---------/ Neodiprion 
lecontet (Fitch), p. 552. 
Body dull green; a double longitudinal black line on dorsum, and 
a broken stripe of black on each side, beneath which is a double 
row of black spots, the latter sometimes obsolete. Pitch and 
shortleaf pines, May—October.__---_-£. == =--_=-=2 Neodiprion 
pini-rigidae (Nort.), p. 556. 
Body light green with 2 narrow dorsal stripes, a broad lateral and 
a narrower one at base of legs dark green; a large blotch on face 
is black. Solitary. Red and Scotch pine. June and July, and 
August to late in fall_______-_- Diprion frutetorum (F.), p. 557. 
Body greenish and heavily striped. Jack pine__-~--_- Neodiprion 
dubiosus Schedl, p. 557. 
Body greenish and lightly striped. Jack pine____-___- Neodiprion 
swainet Midd., p. 597. 
