TEXT-BOOK OF ENTOMOLOGY 



single piece, in Campodea and Macliilis there appears to be an 

 additional basal piece apparently corresponding to the stipes of the 

 A A> B C 



Fio. 46. Various forms of mandibles. A, right and left of Tennopsis. A' showing- at the 

 shaded portion the " molar " of Smith. , Termesjla ripen, soldier ; md, its mandible. C', Panorpa. 



first maxilla, and separated by a faint suture from the molar or 

 distal joint. In Cainpodea there is a minute movable appendage 



figured both by Meinert and by Nassonow, 

 which appears to represent the lacinia of the 

 maxilla (Fig. 48). Wood-Mason has observed 

 in the mandibles of the embryo of a Javanese 

 cockroach, Bkttta (Panesthki) Jamaica, indi- 

 cations of "the same number of joints as in 

 that of chilognathous myriopods, or one less 

 than in that of Macliilis." Also he adds : 

 "In both 'larvae' and adults of Panesthia 

 jacanica a faint groove crosses the ' back ' of 



A 



Fir,. 48. Mandible of Cainpodea: I, prostheea or lacinia; 

 Fro. 47. CMasognatlvitS g, cnlea; ./',/, tlexnr muscles; <% extensor; /, r, retractor ; rt, 

 gntntii, reduced. Mule. mnsole retaining the mandible in its place. After Meinert. A, 

 After Darwin. extremity of the same. After Nassonovv. 



the mandible at the base. This groove appears to be the remains of 

 the joint between the third and apical segments of the formerly 

 4-segmented mandibles." 



