THE HAWAIIAN BEET WEBWORM. 11 



spray. The elbow makes it possible to coat the underside of the leaves 

 thoroughly. It is essential to bear in mind that, unless this surface 

 of the foliage is thoroughly covered with the poison, the spraying 

 will be ineffective. In the gardens about Honolulu, the difficulty 

 of spraying the lower surface of the leaves is greatly increased by 

 the closeness with which beets are planted in the mounded-up beds. 

 If the method of planting were modified so that the plants were 

 grown in slightly separated rows, it would simplify the matter of 

 spraying. 



It is evident that if sugar beets are to become a profitable crop in 

 the Hawaiian Islands it will be necessary to spray them to prevent 

 the ravages of this pest. For spraying large areas, such as fields of 

 sugar beets, it is better to use a large geared or power sprayer. In 

 some experiments which the author conducted on sugar beets in Colo- 

 rado, against a somewhat similar species, the sugar-beet webworm 

 (Loxostege sticticalis L.), ordinary barrel sprayers and geared 

 sprayers, of 125 gallons capacity, were successfully used. With the 

 nozzles arranged as in the accompanying illustration (Plate I, figs. 

 1, 2), it is an easy matter to spray thoroughly the underside of the 

 leaves, if a pressure of 80 to 120 pounds is maintained. 



DESCRIPTIONS OF THE EARLIER STAGES. 



By H. G. Dyar, Ph. D. 



The egg. — Uniformly elliptical, strongly flattened on the upper and lower 

 sides, smooth, minutely granular; white (in alcohol). Size 0.6 by 0.4 by 

 0.25 mm. 



Laid singly on the underside of the leaf near a vein. 



Larva, stage 1. — Head rounded, not much higher than wide, slightly notched 

 at vertex ; smooth, shining testaceous whitish, with four large, black, pigmented 

 ocelli close together in a semicircle, setae rather coarse, pale, those next the 

 ocelli darker. Width, about 0.25 mm. Body cylindrical, slender, uniform, whit- 

 ish or colorless (in alcohol). Setae coarse, from small concolorous tubercles, i 

 and ii nearly in line with some coarse skin spinules near them ; iv and v super- 

 posed, approximate; vi wanting; vii of three setae at the leg base. Legs long, 

 slender, normal. 



The intermediate stages are not complete in the material. In all 

 the larva is whitish throughout, marked only with a subdorsal black 

 speck on joints 2 and 3. 



Larva, last stage. — Head rounded, higher than wide, notched on vertex, clypeus 

 high, reaching vertical notch; whitish, with brown freckles on the vertices of 

 the lobes, cut by a central space devoid of these spots; five pigmented ocelli 

 in a semicircle and one colorless one behind. Width, 1.2 mm. Body cylindrical, 

 slender, uniform, the segments irregularly annulate; abdominal feet slender, 

 cylindrical, the plantae circularly expanded, the crochets in two-thirds of a 

 circle, the open space on the outside; setae fine, from concolorous invisible 



