DERMAPTERA 



463 



with the end of the abdomen of the male below. This species is widely 

 distributed in the United States and is the only species established in 

 Canada. 



The handsome earwig, Proldbia pulchella. — This species is widely 

 distributed over the southern United States; it is found under the 

 bark of dead trees. The body is dark chestnut-brown, shining and 

 glabrous. It measures from 6 to 6.5 mm. in length. This species is 

 dimorphic; in one form, known as burgessi (Fig. 541), the hind wings 

 are shorter than the tegmina. This is one of our few native species. 



The spine-tailed earwig, Doru aculedUim. — In the genus to which 

 this species belongs, the pygidium of the male is armed with a distinct 



Fig. 542. — Doru acu- 

 leatum, male. (From 

 Blatchley.) 



■Pig- 543- — Forficula auricularia: A, 

 male with short forceps; B, forceps 

 of female; C, long type of forceps 

 of male. (After Morse.) 



tubercle or spine (Fig. 542) . This species is dark chestnut-brown, with 

 the palpi, legs, edges of pronotum, and the outer two-thirds of the 

 tegmina yellow. The hind wings are usually aborted. The length 

 of the body is 7.5 to 11 mm. The range of this species extends from 

 New Jersey and southern Michigan west and south to Nebraska, 

 Georgia, and Louisiana. 



The common European earwig, Forficula auricularia. — In this 

 species and in the preceding one as well, the second tarsal segment is 

 lobed and prolonged beneath the third ; but the two species can be 

 distinguished by the shape of the forceps of the male (Fig. 543). 

 The males of this species are dimorphic; in one form the forceps 

 average about 4 mm. in length, in the other about 7 mm. This 

 common European species appeared in great numbers at Newport, 

 Rhode Island, about 191 2. 



