scuDDER.] CANADIAN FOSSIL INSECTS, 25 



Teleoscliistiis antiquus. 



Euschistus antiquus Scltdd. , Rep. Progr. Geol. 8urv. Can., 18*76- 



'77, 459-4G1 (1878). 



Teleoschistus antiqtms Scudd., Tert. Ins. N.A., 454-456, j)!. ii, 

 figs. 17-19 (1890). 



The principal specimen is unusually perfect, and appears to be a 

 male. The head is slightly longer than broad, equal beyond the ex- 

 panding base, broadly rounded and somewhat flattened in front ; the 

 slight carina3 marking the borders of the middle lobe are parallel 

 throughout and extend to the front of the head. The thorax is so 

 imperfectly preserved as to throw doubt upon the generic aflinities of 

 the insect, but it appears to have been more than twice as broad as 

 long, with a median furrow, and its front margin very slightly con- 

 cave behind the head ; probably, also, it was considerably produced 

 at the hinder lateral angles, and had its lateral margin slightly denti- 

 culate anteriorly. The scutellum is large, a little narrower than the 

 breadth of the base of the abdomen, of nearly equal length and 

 breadth, pretty regularly triangular, but with a slight emargination of 

 the sides on their basal half ; the tip bluntly pointed and rounded off, 

 extending a little way upon the middle of the strongly advanced 

 fourth abdominal segment. The surface of the head, pro thorax, and 

 scutellum is covered pretty unifoi'mly and abundantly with distinct 

 round punctures, which are, however, deepest, most sharply defined, 

 and so abundant as nearly to occupy the entire surface, on the front 

 half of the head and next the margins of the prothorax. The corium 

 of the tegmina includes more than half the wing, and is covered with 

 punctures, deeply impressed, and much minuter and more frequent 

 than on the scutellum ; there is also a distinct vein passing down the 

 middle, a little to one side, and another separating the clavus from 

 the corium, but distinct on the specimen only apically, where it is 

 continuous with the inner margin of the membrane. The membrane 

 is well rounded, but slightly produced at the outer angle, and the space 

 is occupied by nine nearly longitudinal veins, distributed in three sets 

 of three each : the first set is composed of three obscure veins, pretty 

 close together next the inner edge, originating from the same point, 

 equidistant from one another, the innermost hugging the inner mar- 

 gin ; from apparently the same point originates the next cluster, 

 starting in a single vein, which almost immediately forks, and sends 

 its innermost branch parallel to those mentioned ; the other branch 

 diverges strongly from it and again forks, the two bi*anches running 



