APPLE INSECTS. 



21 



^Hyponomeiita lualinellus Zeller. H. padellus Linnreus. 



(Apple and Cherry Ermine Moths. Hyponomeutidse; Lepidoptera.) 



These two ermine moths, which are destructive fruit-tree pests, have recently 

 been introduced into the United States, the one well treated in Technical Bulletin 24, 

 of the Geneva, N. Y., Agricultural Experiment Station (1912), to which the reader is 

 referred. (See text fig. 10.) 



Diloba cseruleocephala Linnfetis. 

 (Figure-of-8 Moth. Blue-head. Noctuidse; Lepidoptera.) 



Hosts: Apple, plum, cherry. 



Injury: Seldom seri'ous; defoliation. 



Description and biology: Adult wing expanse of male less than 25 mm. , female 30 mm . ; 

 forewing grayish brown and brown, with a pale spot shaped like a figure 8 on each wing ; 

 hind wing grayish brown with darker ray-like lines and a dark wedge-shaped patch at 

 the hinder angle. Occurs in September and October (England). Larva over 25 mm. 

 long; head blue with two small 

 black dots; body color varied, 

 yellowish green or bhiish gray, 

 with broken yellow line along- 

 side below spiracles; small black 

 spots on segments. Larvae appear 

 when leaves expand and are ready 

 to spin up in June; pupate in crev- 

 vices in bark and on limbs of trees. 

 Eggs usually laid singly on shoots 

 and spurs of fruit trees; they an; 

 round, flattened below, gray or 

 grayish brown in color. (See plate 

 VII, fig. 2.) 



Distribution: England, Europe, 

 and Asia Minor. 

 Theobald, F. V. Insect Pests of 



Fruit, 1909, p. 35. 



Sesia myopaeforniis Bosk. 



(The Apple Clear wing. Sesiidie; 

 Lepidoptera.) 



Hosts: Apple, apricot. 



Injury: Larvae work under bark. 



Description and biology: Adult 

 ^ving expanse 22 to 25 mm. ; head, 

 thorax, and abdomen black; male 

 abdomen has red band above and white beneath; female has only a white edge under- 

 neath, with tail-like fan of black scales; wings transparent with dark scaled areas. 

 Day-flying moths; occur in May, June, and July. (England). Pupa pale brown, 

 protected by silken cases covered with chips. Larva length 15 mm.; dull yellowish 

 white, head reddish brown; second thoracic segment with brown dorsal shield. Eggs 

 laid on tree trunk. (See text fig. 12.) 



Distribution: Europe. 

 Theobald, F. V. Insect Pests of Fruit, 1909, p. 17. 



Fig. 10.- 



-Apple ermine moth (Hypnnomeutamalinellus) Eggs, 

 larva, pupa, adult, and nest. (Henschel.) 



