200 THE CANADIAN ENTOMOLOGIST. 



Finally, besides all this, the fruit-grower can do much to lessen his 

 losses by what is known as clean farming. This is shown in the appear- 

 ance of his orchard, as a result of pruning, removal of rubbish, careful 

 cultivation, and manuring. By such means he may increase the produc- 

 tiveness by securing better fruit, free from scab and worm-hole. 



A NEW CECIDOMYIID ON COTTON. 



BY D. W. COQUILLETT, WASHINGTON, D. C. 



During the past winter Dr. L. O, Howard received specimens of a 

 Cecidomyiid from Sir Daniel Morris, Director of the Imperial Department 

 of Agriculture for the West Indies, with the statement that the larvae live 

 in the cambium layer of cotton plants. Up to the present time no repre- 

 sentative of this family has been recorded as depredating upon cotton so 

 far as I am aware, and at the request of Sir D. Morris the species is duly 

 characterized herewith : 

 Porricondyla (Epidosis) gossypii, new species. 



Antennae of male longer than the head and body together, composed 

 of about twenty-one joints, of which the first two are sessile and scarcely 

 longer than wide, the remaining joints, except the last one, with a bulbous 

 basal portion bearing a whorl of bristly hairs and a narrow apical part, 

 the latter being slightly shorter than the thickened part of each joint. 

 Antennje of female about two-thirds as long as the head and body com- 

 bined, composed of twenty-six nearly sessile joints, the first two joints 

 somewhat conical, the others constricted in the middle, the third joint the 

 most strongly so, each succeeding joint less constricted. Wings hyaline, 

 third vein (the apjiarent second vein) strongly curved and ending below 

 the extreme tip of the wing, small crossvein very oblique and weakly 

 sigmoid. Colours yellow, the sternum and greater part of mesonotum 

 brown, head blackish, antennae of female and the enlarged portions of 

 those of the male brown, the constricted portions of the male antennae 

 white, legs dusky-whitish. Length, 1.5 mm. 



Described from several dry and shriveled specimens of both sexes. 

 Type No. S399, U. S. National Museum. From Barbados, West Indies. 



The full-grown larva; are yellowish-white, the median portion chiefly 

 orange-red; the skin is smooth except on the under side, where there are 

 many minute tubercles arranged in about six irregular transverse rows on 

 the median portion of each segment. The breast-bone is yellow, cylindri- 

 cal, and with a small knob at the anterior end. The larvae live beneath 

 the bark of cotton plants, without forming galls. 



June, 1905. 



