THE ROSE LEAF-BEETLE. 95 



The egg. — The egg is elongate ovate, one side sometimes strongly 

 curved, the opposite with a tendency to straightness except toward the 

 ends. Color, shining dirty whitish gray, not yellowish ; surface with- 

 out sculpture. Leugth, 0.75 to 0.84 ,um ; width, 0.32 to 0.34 mm . 



Eggs that were deposited July 18 hatched on the 25th, giving a period 

 of seven days, which represents nearly the minimum, as the tempera- 

 ture averaged about 86° F. at this time. 



THE ROSE LEAF -BEETLE. 



(Nodonota puncticollis Say.) 



June 4, 1897, Mr. Robert McLean, Baltimore, Md., sent specimens of 

 this species which he reported to be "causing some destruction to sev- 

 eral trees" in his garden in the country near there. The beetles were 

 said to be "consuming all the leaves from the trees." No particular 

 trees were specified, but they were presumably fruit trees. 



This insect was also injurious in at least one locality that year near 

 Washington. It was stated by the late Mr. G-. H. Hicks to be very 

 troublesome on roses at Kensington, Md. 



June 4, 1898, beetles were found in abundance on the young terminal 

 leaves of ornamental willow at Tennallytown, D. 0., being at this time 

 more numerous on this tree than upon blackberry in the immediate 

 vicinity. 



Previous efforts to obtain the eggs of this genus, as already mentioned, 

 failed in spite of the best conditions that could be secured. 



June 9 Mr. F. C. Pratt obtained, at the writer's request, a large series 

 of this species on the occasion of a trip to Woodstock, Va., from which 

 eggs were secured later. It was extremely abundant at that place on 

 blackberry as well as on wild rose. 



Eggs were deposited June 12, in one instance in a mass of 19, placed 

 side by side in the same manner as in W. tristis. From the eggs of that 

 species they differed in no observable way. The average measurement 

 was 0.80 mm long and 0.30 mm wide. 



Among the beetles received from Woodstock, Va., one was noted on 

 the under surface of which was a larval mite which has been identified 

 by Mr. Nathan Banks as JEupalpus echinatus Bks. 



REMEDIES. 



These leaf-beetles are amenable to the same treatment as the cherry 

 leaf beetle and imported elm leaf-beetle. As they do not iiy quickly, it 

 is easy to capture them by jarring them onto inverted umbrellas or 

 other similar specially prepared appliances saturated with kerosene. 



Note. — Nodonota clypealis Horn has been noticed in July and early August in great 

 abundance in Maryland near the District line on the fresh terminal leaves of Acti- 

 nomeris squarrosa growing on high land as well as on Ambrosia trifida on river 

 bottoms, as previously reported. 



