STRAWBERRY INSECTS 369 



References 



Mally, Insect Life, II, pp. 137-140. 1889. 

 MaUy, Insect Life, III, pp. 9-12. 1890. 



In Colorado a sawfly {Emphytus gillettei MacGillivray) with 

 habits almost identical with those of the above has been re- 

 ported as locally destructive. The larva is nearly an inch in 

 length when full-grown, green above and cream colored beneath ; 

 the head is yellowish with a brown patch above. 



Reference 

 Johnson, Rept. Ent. Col. 1903, pp. 13-14. 



The Strawberry Whitefly 

 Aleyrodes packardi Morrill 



This near relative of the common whitefly of the greenhouse 

 is often found on strawberries growing out of doors, but has been 

 reported as noticeably destructive only in one instance, in south- 

 eastern New York. 



The insect passes th(^ winter as a minute, smooth, oval, metallic 

 bronze-colored egg attached to the underside of the leaf by 

 a short stalk. The winter eggs hatch in early spring into 

 minute, flat, pale green, lice-like insects which are able to crawl 

 some distance over the surface of the leaf. The insect soon 

 settles down, punctures the leaf with its bristle-like mouth 

 parts through which it feeds on the saj). It remains stationary, 

 soon loses the use of its legs and secretes a covering of wax which 

 gives it the appearance of a scale insect. It molts three times 

 and then assumes the so-called pupa form. In this stage the 

 insect appears as a delicate, greenish-yellow, oval wax box with 

 perpendicular sides, about ^V i^^^h in length, and has the dorsal 

 surface ornamented by long curved waxen rods. In about 

 2b 



