No. 34-] HEMIPTERA OF CONNECTICUT I CIMICIDAE. 669 



The tylus is large, parallel-sided, and produced far beyond the base 

 of the antennae ; rostrum short, three segmented ; antennae rather 

 long, four segmented; pronotum broadest before the middle; 

 hemielytra reduced to short scale-like condition; tarsi three seg- 

 mented ; ocelli absent. One of the two subfamilies is represented 

 in our fauna. 



Subfamily Cimicinae. 



This group includes the greater part of the family. The ros- 

 trum does not extend beyond the front coxae, and the large bristles 

 of the genitalia and thoracic margins are broad, curved and more 

 or less serrate on convex side. 



Key to Genera. 



Pubescence of body very short, except along pronotal and hemi- 

 elytral margins ; anterior pronotal margin very deeply concave Cimex 



Pubescence long and sericeous ; anterior margin of pronotum shal- 

 lowly concave, nearly straight at middle Oeciacus 



Cimex Linnaeus. 

 Species of moderate size with very fine surface pubescence. 



Key to Species. 



Fringing hairs of pronotal margin shorter than width of eye ; hemi- 

 elytral commissure shorter than scutellum lectularius 



Fringing hairs longer than width of eye; commissure longer than 

 scutellum pilosellus 



C. lectularius Linnaeus. Common bed-bug. (PL xvi, 32.) 



Syst. Nat.. Edn. 10, 441, 1758. 



Brown, with reddish or yellowish tinge ; hemielytra reduced to 

 a single short plate, hind margin nearly straight, the inner apical 

 angles broadly rounded, the suture or commissure shorter than the 

 scutellum. Length, 5-6 mm. 



This species, the bed-bug, is found throughout the world, having 

 been carried on ships, where it is as much at home as in houses. 

 Owing to the annoyance of its attacks upon man and the danger 

 that diseases may be transmitted by its bites, this insect has received 

 much attention from early times. An account with practical advice 

 for extermination is given by Marlatt (1916). 



Hartford, 13 Aug., 1891 (A. P. M.) ; New Haven, 1906 (B. H. W.), 

 28 Oct., 1916 (Q. S. L.) ; North Haven, 16 Oct., 1908 (B. H. W.) ; Dan- 

 bury, 20 June, 1919 (G. M. Codding) ; Wallingford, 18 June, 1912 

 (D. J. C.) ; Highwood, 28 March, 1915 (M. P. Z.). 



C. pilosellus (Horvath). 



Ent. Mon. Mag., xxi, 12, 1910. 



Hind margin of hemielytra nearly straight, the inner angles 

 scarcely, the outer broadly, rounded; scutellum shorter than the 

 hemielytral suture. Length 3.75-4.25 mm. This species lives on 

 bats ; it has been found in Massachusetts. 



