1924 ENTOMOLOGICAL SOCIETY 15 



body colour. Body with many small hairs, legless and strongly curved, con- 

 forming with the position assumed in the hips. One pair of spiracles on the 

 prothorax and eight on abdomen, each with two lobes. Larval movements are 

 extremely awkward and effected by means of the two extremities and the longit- 

 udinal contractions of the body. Length of larva: 5-6x2.5 mm.; width of 

 head: 1 mm. 



Pupa. Resembles the larva in size and colour and responds to gentle 

 stimulation with quick but purposeless jerks. 



Adult. General appearance is as described by Blatchley and Leng (Rhyn- 

 cophora of *N.E. America, p. 58) except that the head frequently is entirely 

 black. This was the case in 26 per cent, of a large series of the beetles collected 

 by sweeping in the same vicinity. 



"Robust, convex, pyriform. Elytra, thorax and head behind eyes bright 

 red; under surface, femora and beak black; tibiae, tarsi and antennae piceous 

 black. Beak as long as head and thorax, rather sparsely marked with elongate 

 punctures; antennae inserted at its middle, their grooves distinct. Thorax 

 cylindrical, as long as wide, rather densely and finely punctate. Elytral striae 

 indistinct, their punctures but little coarser than those of intervals, which are 

 very dense. Beak of female shorter and stouter than in male. Length: 5 to 

 6.5 mm." 



Control. The control of the Rose Curculio is difficult, particularly so 

 when the adults are not anticipated or discovered early enough, for a very few 

 will cause extensive mutilation. Others, moreover, are likely to migrate from 

 neighbouring bushes. When small numbers occur, hand-picking, net-sweeping 

 or shaking into an umbrella, etc., will suffice, but for a severe outbreak heavy 

 applications of spray, using lead arsenate in the strength of 3 to 5 lbs. per 50 U.S. 

 gallons of water is the most efficient procedure. By this method a 95 per cent, 

 kill has been obtained. Spraying has the advantage of also destroying certain 

 other larvae which feed upon the foliage at the same time of the year. 



If an examination of the hips in the autumn shows a fair percentage of 

 infestation, e.g., 20 per cent., of larvae present, then spraying might well be begun 

 the first week of the following June, even before the beetles have been noticed. 

 Still more certain is the practice of picking and burning all the hips before the 

 first of September, thus catching the larvae before they have fallen to the ground. 

 In any event, very careful observation is a necessary factor in their control. 



Other Insects Affecting Roses. In addition to the Curculio there are 

 several insects which at one or more stages of their life histories produce injury 

 to roses. These include a dipterous and a chrysomelid larva which infest the 

 hips, a Scarabaeid which feeds upon the leaves, and other chrysomelidae which 

 feed largely upon the flowers. 



Noteworthy among these is the pretty green and black Scarabaeid, Diche- 

 lonyx backi Kay, which exhibits a distinct fondness for rose foliage. As many 

 as thirteen of these beetles have been seen feeding simultaneously upon a single 

 small plant of R. acicularis in the Kennedy district of Saskatchewan. 



To be noted also are certain chrysomelids, including Haltica tombacina Mann., 

 and Calligrapha lunata Fab., as well as a fly Spilographa setosa Doans, which has 

 been found in its larval state to inhabit the rose hips during the autumn, not 

 infrequently along with R. bicolor. Later it passes to the ground, where it forms 

 its puparium and emerges as an adult late the following June. In the hip the 

 larva is confined more to the juicy outer wall than to the seeds as in the case of 



