62 Journal New York Entomological Society. t Vo1 - xxvu. 



many weeds around the patches, but some in them as well. Under 

 ordinary conditions where the rose-mallow is grown as an orna- 

 mental, it is doubtful if the plants would very often become infested. 



Other Lepidoptera. 



Two or three different times during the summer single, slender, 

 rather prettily marked geometrid larvae were found feeding on the 

 blossoms of the swamp rose-mallow. One of these was bred to ma- 

 turity and proved to be a species of Eupithecia. 



Other Insects Infesting the Stems and Leaves. 

 Neolasioptera hibisci Felt. 



This cecidomyid was described by Felt in 1907 (N. Y. State Mus. 

 Bull., no, 155-6) under the generic name CJwristoneura. Dr. Felt 

 stated that it was bred April 25, 1907, from slightly enlarged stems 

 of the rose marsh-mallow (Hibiscus moscheutos) taken on Staten 

 Island, N. Y. (Type Cecid. a 1410, N. Y. State Mus.) He again 

 mentions this species in his reports for 1907 (N. Y. State Mus. Bull., 

 124, p. 320 and 333) and 1916 (N. Y. State Mus. Bull., 198, p. 196), 

 and in the latter describes the gall and larva as well as again giving 

 descriptions of the male and female and figuring burrows in the stem. 



The gall of this species is an abnormal thickening of the stem of 

 the hibuscus. Concerning it, Felt says : " Infested stems can usually 

 be discovered by a somewhat abnormal thickening, though occasion- 

 ally a badly infested stem may be nearly twice the usual size. The 

 female appears to deposit eggs in a small slit in the stem, the larva 

 usually tunneling the pith and frequently excavating a channel just 

 beneath the surface. The larvae occur singly or in numbers in the 

 pith and occasionally in the outer portions of the tissues. One stalk 

 may be infested by only a few larvae or may contain 50 to 100 or 

 more." 



These galls were first noted by us in August, 191 7, in a bed of 

 hibiscus seedlings in a nursery at Rutherford. The plants varied 

 from six to fifteen inches in height and several of them showed the 

 gall-like swellings which contained larvae and a few pupae. Adults 

 emerged from these later in the month. Later, during 191 7 and 

 several times during the present year 1918, these galls have been 



