10 



could be detected only in this one garden and only to pole Lima beans. 

 Dwarf Limas, wax and navy beans in the immediate vicinity as else- 

 where were not troubled. 



NATURE OF ATTACK OBSERVED IN MARYLAND. 



During November, 1898, vines of Lima beans growing in a garden 

 in the vicinity of Cabin John Bridge, Maryland, were noticed with 

 numerous large gall-like swellings upon them, the swellings being 

 particularly evident where the vines were eroded and the injury 

 accentuated by rubbing against a high lattice fence upon which they 

 grew. Unfortunately it was too late that season to identify the insect 

 which caused this damage, as all the plants were dead and dry and the 

 insects had long since deserted their early homes. The injury bore 

 some resemblance to that caused by the well-known stalk borer, 

 Gortyna nitela Gn., which attacks a great variety of plants. The 

 galls, as these swellings may be called, are quite large in some cases, 

 and it was quite evident, as was subsequently verified, that when they 

 occur in such numbers as in this instance they cause considerable 

 drain upon the vitality of the plant which has a corresponding effect 

 upon the production of seeds or beans. 



A lookout was kept the following summer for an early attack of the 

 same species, but unfortunately only a small planting of Lima beans 

 was made in the infested garden, and no vines were planted along the 

 fence. Judging by the number of galls seen in 1898, it seems probable 

 that an immense number of the larvae came to maturity that year, but 

 there were comparatively few plants infested the following year. 



Of the moths reared, the single male from Alabama and a female 

 from Maryland were referred to Rev. George D. Hulst, of Brooklyn, 

 N. Y., a specialist in the Phycitidae, who determined them as of one 

 species representing a new genus and a form as yet undescribed, to 

 which he had given the manuscript name of Monoptilota nubilella. 

 Owing to the unipectinate structure of the antennae of the male (unique 

 with the genus Ceara of Ragonot) the writer was at first in doubt as to 

 the identity of the two sexes as one species, but this matter is now set 

 at rest. As to the position of the genus, Dr. Hulst says that taking 

 into account the most of its apparent affinities it may be placed after 

 Phycitopsis and before Dioryctria, this position seeming to be indi- 

 cated in some measure by Ragonot's Monograph. 



The species may be known as the Lima-bean vine-borer. 



THE SPECIES DESCRIBED. 



The following description has been kindly furnished by Dr. Hulst, 

 axid although it has also appeared in the Canadian Entomologist of 

 Januaiy, 1900 (Vol. XXXII, pp. 13, 11), it is deemed advisable to 

 publish it entire here in connection with the illustrations. For the 



