SCUDLER ON FOSSIL INSECTS. ' 761 



Family Tettigonid^e. 



Tettigonia ohtecta. — A single specimen, with the merest fraoQieuts of 

 wings and no legs, but otherwise pretty perfect, belongs, with little 

 doubt, to this family, although its generic affinities are uncertain. The 

 head is not quite so broad as the body, bluntly angalated in front (at 

 an angle of about 130°) ; the eyes are rather small, the beak stout and 

 about as long as the head. The abdomeu is moderately stout but long, 

 tapering to a blunt tip ; the segments eight in number, growing longer 

 apically, the seventh being twice as long as the second. Length of 

 body 7.6"""; breadth of same 2^™; length of rostrum 0.65"""; diameter of 

 eyes 0.28"'"'. Chagrin Valley. 



BytJioscopus lapidescens. — A single specimen, broken at the edge of a 

 stone, and so preserving only the abdomen and part of the wings. The 

 abdomen is long and slender, composed of nine segments, the extremity 

 indicating that it is a female. The wing (the tegmina appear to be en- 

 tirely absent) reaches the tip of the abdomen, and the apical cells are 

 from a third to nearly half as long as the wing, the upper the longer ; 

 the apex is produced but rounded. Probable length of body 5.5""'; 

 length of fragment 3.-3""; breadth of abdomen 1.5""". Chagrin Valley. 



Family Lyg^eid^. 



Pacliymerus petrensis. — A single specimen, of which most of the right 

 half is destroyed, represents this species, which is placed here provision- 

 ally, principally because it appears to be closely related to fossil species 

 put in this group by Heer. It seems to be a larva, and to belong either 

 to the JRliyparochromicUv or the Anthocoridce of the British Catalogue. 

 The outline of the head is vague and broken, but the front is apparently 

 bent at a right angle. The an ten n tie are about half as long as the body, 

 four -jointed ; the basal joint only about half as long again as broad, the 

 others subequal, very slightly smaller at the base than at the apex, but 

 otherwise equal, the second a very little the longest, the last pointed at 

 the tip. Thorax and abdomen of about equal length, the former equally 

 broad throughout (or nearly so) ; the fore and middle femora short and 

 stout, about^as long as their separation from each other. Abdomen ex- 

 panding suddenly at the base, so that the second segment is broadest 

 and apparently half as broad again as the thorax, beyond tapering rather 

 rapidly to a rounded tip. This form of the abdomen does iiot appear 

 consonant -with Fachi/merus, Length of body 3"'"'; autenme 1.5'""'; fore 

 femora 0.35"'". Fossil Caiion. 



Family Physopoda. 



Melanothrlps eitincta Scudd. Bull. Geol. Geogr. Surv. Terr, i, ii, 221 

 Chagrin Valley. 

 Lithadothrips vetusta Scudd. loc. cit. i, ii, 222. Fossil Caiion. 

 Fcd(vothri2)s fossiUs Scudd. Geol. Mag. v, 221. Fossil Canon. 



