﻿8 BULi,E*I]Sr 1357, U. S. DEPARTMENT OF AGilICtJLTUfei& 



from the plants onto paddles covered with sticky fly paper, and 

 where they were very numerous enough were collected along a 150- 

 foot walk to cover a sheet of the paper; nevertheless, the plants con- 

 tinued to suffer from the ravages of those which escaped collection. 



According to estimates of florists in Bucks and Montgomery Coun- 

 ties, Pa., damage to the extent of $70,000 was done to their green- 

 house rose plants in 1920. The records of one grower show his gross 

 income from one rose house to have been 74 cents per plant from July 

 1, 1919, to February 1, 1920, as compared with an income of $1.17 for 

 the same period the preceding year. The decrease of 43 cents per 

 plant was attributed almost entirely to the ravages of the beetles. 



Another florist, whose gross annual return from 40,000 rose plants 

 was from $70,000 to $80,000, estimated that his loss during 1921 was 

 $9,000. He was unable to cut any salable flowers from June 25 until 

 late in September, and his production suffered to some extent during 

 the rest of the year. His loss may be analyzed as follows : 



Cut flowers: 



Expected return during period when shipping was stopped $4, 320 



Actual return $0 



Loss 4, 320 



Estimated loss because of reduction of production 2, 000 



Insecticides : 



Tobacco dust, 50 tons at $35 per ton 1, 750 



Fertilizer value at $10 per ton 500 



Insecticidal expense 1, 250 



Wood ashes, 25 tons at $30 per ton 750 



Fertilizer value at $10 250 



Insecticidal expense 500 



Arsenlcals and miscellaneous proprietary compounds and 



equipment 400 



Labor in application of insecticides, etc., 2,000 (estimated) 



man hours at 30 cents 600 



1,000 



Total 9,070 



Losses and expenses such as are illustrated above will quickly ab- 

 sorb all the profits of a grower, because of the competition with other 

 florists whose establishments are not suffering from the ravages of 

 this insect. 



LIFE HISTORY AND HABITS 



ADULT STAGE 



The original description of the variety quadrinotata as given by 

 Say {26^ f. J{.Jf6) is as follows : 



Colaspis 4-notata : Black ; head rufous ; elytra testaceous, with two black 

 spots. Inhabits the United States. Body black, punctured ; head obscure 

 rufous ; antennae paler at base ; thorax black ; immaculate ; punctures sparse, 

 not profound ; scutel pale reddish-brown ; elytra pale testaceous, with striae of 

 punctures which become obsolete before the tip ; a black, oblique spot near the 

 base of each and a larger obliquely quadrate one on the middle, exterior edge 

 black; feet pale; thighs with a minute angle beneath. Length about three- 

 twentieths of an inch. 



It is evident that the name was given because of the four black 

 spots on the elytra. The principal distinguishing color features are 

 the black thorax, the brown elytra bearing the four black spots, and 

 the absence of black markings along the suture. 



