8 BULLETIN 1357, U. S. DEPARTMENT OF AGRICULTURE 
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 48 cents per | 
plant was attributed almost entirely to the ravages ef 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 Tetn rie ses 5 2 ee ee ee $0 | 
|S ait Be Dh i atl ti Be A aetna ed AS ht 4, 320 | 
Estimated loss because of reduction of production__________\~------- 2, 000 
Insecticides : ‘ 
Fobaeco.Gust, S0itons at S35: per tone 2 wee ee 1, 750 
Pertilizer value at $10 per ton 2 too es Te ee eee 
Insecticidal expenses 20-2 ok a eee 
Wood ashes. 25 tons at So0-per tOn Sor he sos he ha kee ie TOO 
Fertilizer value at DUCE eee pene 2” Ly cealeaie RS eae - 250 
mNSecticidalexpense k= a Mar ORE ees te eee 500 
Arsenicals and miscellaneous proprietary compounds and 
GOING 2 ee a ek 2 he re a A 400 
Labor in application of insecticides, etc., 2,000 (estimated) 1 
Man HOUIS Al, oO COM see ee ae Ee ie a eee 600 , 
1,000 
A 0] 2 | Em es Se Me Sk ce ie SBS AD aed gee MR ee nines Pra ES <n ert 9, O7" 
Losses and expenses such as are illustrated above will quickly ab 
sorb all the profits of a grower, because of the competition with othe. 
florists whose establishments are not suffering from the ravages o. 
this ‘insect. 
LIFE HISTORY AND HABITS 
ADULT STAGE 
The original description of the variety guadrinotata as given by | 
Say (26, p. 446)-is as follows: 
Colaspis 4-notata: Black; head rufous; elytra testaceous, with two black | 
spots. Inhabits the United States. Body black, punctured; head obsecur 
rufous; antennae paler at base; thorax black; immaculate; punctures spars: ©: 
not.profound ; scutel pale reddish-brown; elytra pale testaceous, with striae « at 
punctures which become obsolete before the tip; a black, oblique spot near tl '€ 
base of each and a larger obliquely quadrate one on the middle, exterior eds >© 
black; feet pale; thighs with a minute angle beneath. Length about thre €- 
twentieths of an inch. f 
It is evident that the name was given because of the four black 
spots on the elytra. The principal distinguishing color features ate 
the black thorax, the brown elytra bearing the four black spots, and 
the absence of black markings along the suture. 
