European Corn Borer 173 



Frontal punctures close together; very slightly forward of frontal setse; distance 

 between punctures less than distance from puncture F* to setae F^ ; distance from 

 frontal setae (F') to first adfrontal seta (Adf*) about equal to distance separating ad- 

 frontal setae ( Adf ' and Adf^) ; Adf ^ approximate to beginning of longitudinal ridge ; 

 puncture Adf^ about equidistant from Adf and Adf-.^ 



Epicranium with the normal number of primary setae and punctiu-es and with the 

 three ultraposterior setae and one ultraposterior puncture distinguishable. Anterior 

 setae (AS A^, A^) forming a slightly obtuse angle; anterior puncture (A'') posterior to 

 seta A^. Posterior setae (P' and P-) and punctiire P'' about middle of head; P' nearly 

 on the level of lateral seta (L'), behind the level of Adf*; P^ behind the level of place 

 of jimcture of adfrontal ridges; posterior puncture P* approximate to lateral seta 

 (L'); posterior punctvu-e P** lying between P' and P- approximate to P^; P', P"^, P^and 

 setae and punctiu-e of ultraposterior group forming nearly a straight line with frontal 

 seta (F'). Lateral seta (L') well forward on head but not closely approximate to A^; 

 lateral pimcture posterior or postero-ventrad to L', remote. Ocellar setae (O', 0-, O^) 

 well separated; O^ ventrad of ocelli II and III, approximate to ocellus III; O^ ventrad 

 or postero-ventrad of ocellus I ; O^ directly ventrad of O^, remote, further from O^ than 

 O^ is from O^ ocellar puncture (O") approximate to ocellus VI. Subocellar setse 

 (SO', SO2, S03) triangularly placed; puncture SO^' nearer to SO^ and SO^ than to SO'. 

 Genal puncture (G") anterior to the seta (G'). 



Labrum with median incision broadly triangular, moderately deep; median setae 

 (M\ M^, M^) triangularly placed; M- postero-laterad of M' and considerably closer to 

 M' than to M^; La' directly laterad of and closely approximate to La^; La' and La^ on 

 the level of M'; La^ and M^ on the same level, rather well back of anterior margin of 

 labrum ; puncture approximate and posterior to M-. 



Epipharyngeal shield narrowly bordering the greater part of median incision of 

 labrum. Epipharyngeal setae triangularly grouped ; well separated and well behind 

 anterior margin of epipharynx; narrow, moderately long. Epipharyngeal rods indi- 

 cated only by their prominent posterior projections. 



Maxillulae normal; the large lateral lobes heavily spined but without blades or 

 distinctly modified setse. 



PYRAUvSTA NUBILALIS 



Pyrausta nubilalis Hiibner, 1901, in Stand, and Rebel, Cat. Lepidop., Aufl. 3, 

 Bd. 2, p. 65, No. 1218. 



ADULT 



Male. — Underside of palpi snow white; palpi otherwise grayish fuscous. Head 

 and thorax grayish fuscous. Forewing dark grayish fuscous; transverse antemedial 

 and transverse postmedial lines outwardly margined with bright ochreous which, 

 in the latter, broadens out to a distinct blotch at tornus; area between obicular and 

 discal mark bright ochreous; at base of inner margin a distinct oval patch of firmly 

 attached semimetallic brown sex scaling under surface scaling of the wings. Hindwing 

 dark grayish fuscous; a broad, pale ochreous postmedian fascia not extending com- 

 pletely to dorsum. Abdomen dark grayish fuscous above; posterior margins of seg- 

 ments edged with a fine line of white scales. Genitalia (PI. 7, A) as figured; apex 

 of tegumen shortly trifurcate; anellus with two long, slender, dorsally projecting arms 

 (anellus lobes); harpe with three stout spines arising from inner margin of sacculus 

 at fusion with base of clasper; face of clasper oval, somewhat kidney-shaped. Alar 

 expanse, 20 to 26 mm. 



' There are some individual variations and considerable asymmeto' in difTcrcnt specimens of the same 

 species in the position of the adfrontal setae and puncture and also in the length of the longitudinal ridfie. 

 The setse will not always be on the same level on both sides of the head, and hi some specimens Adf» will 

 be slightly nearer to Adf than to Adf; but aside from such individual variations, which are common amoae 

 lepidoptcrous larvoe and for which allowance must always be made, the characters hold remarkably well. 



