New Yoek Agtcicultukal Experiment Station. 327 



of the pest the removal of weeds that are attractive to the insect 

 for purposes of propagation would appear advisable as a precaution- 

 ary measure. 



SOME ASSOCIATED INSECTS. 



Associated with invitus in its attacks on the leaves and fruits of 

 different hosts, we have found a number of other species of capsids 

 which are briefly noted as a matter of record. 



Lygidea mendax Reut. — Besides apples this species was quite 

 abundant on pears and plums in an extensive planting of these 

 fruits about Lockport. The nymphs confined their attacks princi- 

 pally to the succulent growth of the trees and did considerable injury 

 to the young leaves. 



Prof. C. R. Crosby has cited the occurrence of this insect on pear 

 in Japan, and has described in detail its importance as an apple 

 pest 24 . 



Campylomma verbasci Meyer. — This capsid in its various nymph al 

 stages and as an adult attacks pear foliage and fruit in a manner 

 quite similar to Lygus invitus. In our breeding work we reared the 

 species through its successive instars along with the nymphs of 

 invitus, not realizing that there was any contamination by a second 

 species until the appearance of the fourth and fifth nymphal instars. 

 Newly-hatched nymphs of this species were obtained on May 2 and 

 adults appeared on May 20. The nymphs were very active crea- 

 tures and fed on both foliage and fruit. Sap flowed quite profusely 

 from the wounds in the young pears, but as our observations were 

 confined to specimens in the laboratory we have not been able to 

 determine the effects of the early work of this species on the mature 

 fruit. Judging from the few individuals that we reared of verbasci 

 as compared with invitus it would appear that this insect is only of 

 slight economic importance. 



The adult at emergence is pale greenish in color, and at that time 

 is to be distinguished from i?witus chiefly by numerous brownish 

 spots on the legs. The mature insect has been described by Reuter 25 

 as follows: 



"Under side of abdomen brown or jet black, upper surface greenish gray or dirty- 

 grayish white, shining, with long, golden yellow hairs which become brown in certain 

 lights, and also a short, golden yellow pubescence; head, testaceous; clypeus, brownish 



"Cornell Expt. Sta. Bui. 291. 1911. 

 »Hem. Gym. Eur. 1:53,175. 1878. 



