Vol. XXXl] EXTOMOLOGICAL XEWS 12$ 



efficient of the parasites, and preys upon all of the commoner 

 aphides. The large lady-beetle, Cycloneda, is greatly ham- 

 pered in its multiplication by the attack of an Encyrtid hyper- 

 parasite, Homalotylus sp., and the black, mummied larvae 

 containing these parasites, or their exit holes, may often be 

 found under the cal>'x on the boll. 



The green flower beetle, Diabrotica graminea Balz., is 

 often seen eating cotton blossoms or foliage, and the larvae 

 doubtless attack the roots to some extent. This beetle is 

 very fond of Malvaceous plants, and is a serious pest of okra 

 blossoms and leaves in July. 



Occasional nymphs and adults of a species of Empoasca 

 not yet .determined, have been found on foliage and bolls. 

 Two adults of the Membracid, Antianthe expansa (Germ.), 

 one adult of a species of Agallia, and occasional adults of 

 Oliaris sp., which is a very general feeder, have been found on 

 teoninal stems. 



Nymphs of the green bug, Nezara viridula (Linn.), in the 

 early instars, were found under the calyx on many cotton 

 bolls in early January, and the adults began to appear in 

 latter part of the month. This bug was not noticed earlier in 

 the year 19 19. Although it is recorded as a pest of cowpeas 

 and tobacco in Florida, and of tomato in Jamaica, it has not 

 been observed in Porto Rico to attack any of these plants, 

 which have been growing in immediate vicinity of the cotton. 

 The presence of the green bug in a cotton plantation should be 

 looked upon with apprehension, in view of the fact that it 

 has been proven to be a purveyor of cotton anthracnose in 

 Georgia, and of an internal disease of the cotton boll in Bar- 

 bados and neighboring islands. 



Lepidopterous larvae of small size have been found feeding 

 and webbing beneath the calyx on cotton bolls, and are being 

 reared for the determinations. None of them, however, 

 resemble the pink boll worm. 



