346 



THE CANADIAN ENTOMOLOGIST 



Fig. Ifi. l.ygus inrilus 

 say, male genital clasper»; 

 a. lateral aspect of the 

 sinistral forcep; b. sinistral 

 forcep dissected, dorsal as- 

 pect; r, dcxtral forcep dis- 

 sected, ventral asi.ect. 



tarnished plant-bug. In a previous article, (Jour. Ec. Ent., vol. 



8, p. 296, 1915) the writer described the 

 manner of oviposition of the false tarnished 

 plant-bug which is the same insect as com- 

 miinis described below, while the reference 

 to this species breeding on elm refers to 

 the true invitus of Say- 



The male claspers of invitus show a 

 close similarity to those of communis, 

 but the practiced worker will note ce'tain 

 constant differences, and which are exhibited 

 in the drawings (figs. 16, 17). The absence 

 of a spine on the inner cur\-e of the dextral 

 forcep of invitus will distinguish this species 

 at once from communis. 



Ly{!,us communis n. sp. P^asily distinguished from invitus 

 by the two black rays on the disk of the pronotum and by reddish 

 in the lateral stripe on the body. Differs structurally in not 

 having the impressed longitudinal line 

 on the vertex and in th? form of the 

 male claspers. 



Male — Length 5.5 mm. Head: 

 width across the eyes, 36*; width be- 

 tween eyes, 15; length (lateral measure- 

 ment) 14; height at base, 22; yellowish 

 brown or greenish marked with reddish ; 

 basal half of the tylus, arched portions 

 of the juga, lora;, and buccul?c marked 

 with reddish, also the front frequently 

 marked with red in the form of trans- 

 verse lines; apical half of the tylus dark 

 brownish to fuscous; vertex full, with- 

 out an impressed longitudinal line as in 



invitus, but having a slight triangular, flattened space just before 

 the carina; eyes dark brownish, sometimes faded to pale on the 



* Measurements for the head, antennae and pronotum are given in 

 micrometer readings which for comparison are more useful than figures given 

 in millimeters. To reduce these measurements to millimeters multiply 

 by .0285. 



¥'\R 17. Lygus communis, male 

 genital claspers; a, lateral aspect 

 of sinistral forcep; h. sinistral 

 forcep dissected, dorsnl aspect; c. 

 dextral forcep dissected ventral 

 aspect. 



