No. 4.] GYPSY MOTH — APPEXDIX. 403 



think under natural conditions the period spent in this stage 

 would be somewhat shorter. 



I have been unable to find in the literature at my disposal 

 any description of the imago of this species, and it seems 

 doubtful if such a description has been heretofore published. 

 At my request Prof. P. E. Uhlcr has kindly prepared, for 

 publication in this connection, the following characteriza- 

 tion of the species : — 



Fodisus placidus Vhler. — (Plate 1, Fig. 6.) " Of a narrower 

 and more oval foi-m tlian P. serieventris, with a head somewhat 

 tapering anteriorly, and rounded at tip instead of being truncated, 

 and with the humeral angles rounded off and very moderately 

 prominent. Color pale testaceous, stained with pale bi'own and 

 punctate with darker brown. Head much longer than wide, de- 

 pressed, remoteh^ punctate, the edge retlexed, brown; each side 

 of tylus is a slender brown line which is triangularly expanded 

 on the base of the vertex ; occipital margin dark brown in the 

 middle, pale and narrowly callous each side ; a pale callous line 

 extends back from each ocellus ; throat whitish testaceous ; 

 cheeks with a slender black line before each eye ; eyes brown, 

 bordered with testaceous behind ; antenuaj pale brown, paler at 

 base and ou the two last joints ; the basal joint testaceous, very 

 short, the second longest, third scarcel}^ more than half the length 

 of the second, fourth about three-fourths as long as the second, 

 fifth a little shorter than the fourth ; rostrum stout, pale testa- 

 ceous, reaching upon the posterior coxa?, the apical joint narrow, 

 about as long as the preceding one, brown. Pronotum with the 

 sides straighter than usual, the lateral margin narrowly callous, 

 pale ivory yellow, and witli a few indented points and small teeth 

 before the middle ; the submargin with a brown line, surface with 

 wavy, transverse pale lines between the pale brown marbling, 

 more generally brown behind the middle ; posthumeral margins 

 slightly sinuated ; anterior margin callous, having a small group 

 of coarse punctures behind each eye ; punctures sunken, brown, 

 mostly not close together in the transverse series ; posterior mar- 

 gin ti'uncate. Scutellum long, bluntly rounded and margined 

 with white at tip, punctures in short transverse series, grouped in 

 about three spots at base. Corium slenderly bordered with pale 

 testaceous, more broadly covered with brown at base and ou the 

 disk, the veins posteriorly yellow ; membrane pale bronze. Legs 

 minutely speckled with red, the tibiae and tai'si a little stained with 

 brown. Under side finely punctate, the sternum with two series 



