1868.] 139 [Hagen. 



Section of Entomology. October 28, 1868. 



Mr. E. Burgess in the chair. Eight members present. 



The Secretary read the following communication which he 

 had received from Dr. Ilngen, in rectification of a paper by 

 the latter upon Sodotertnes japonicus} 



I have compared the insect described by me as Hodotermes japoni- 

 cus Avith iho- Forjicula communicated by you. I have doubtless been 

 in error; my tyjDe is a Foi'Jicula, with the last abdominal segment 

 injured. I think it is an immatui'e female, as it does not possess the 

 carinated elevation on the sides of the second to the fourth abdomi- 

 nal segments. It is probably Forjicula (Brachylabrls) marilima, 

 which is found all over the world, and has been described from Japan 

 by De Haan and Dohrn. 



This error is the more interesting to me from its bearing on tlie 

 classification of Orthoptera. I think it proves that the wide separa- 

 tion of the Labidura or Dermaptera from other Orthoptera, so often 

 insisted upon, is not founded in nature; and that the three families, 

 Tennitina, Blattina and Forficulina, are coordinated, and very nearly 

 allied. 



The following paper was read : — 



A Century of Orthoptera. Decade T. — Gryllides. 

 By Samuel II. Scudder. 



1. Tridaetylus major. Pale dull yellow, with dull brownish 

 blotches on the front of the head, on the base and tips of the tegmina, 

 and just beyond the middle of the hind femora; intermediate tibiae 

 crossed by one stripe, and femora by two stripes; the wings extend a 

 little beyond the abdomen; the fore tibia is dilated, especially toward 

 the extremity, where it is armed with very short spines; the hind 

 tibiie are armed with three lamina?, and protected at the tip liy two 

 flattened elongated spines, after the manner of Rldpipterijx] there are 

 no other appendages to the hind tibiae, although the sculpture of the 

 pleura of the pronotum is like that of Tridaetylus, and not that of 

 Rhipipteryx. Length .4 in. Bengal. 



2. Tx'igonidium paeifleum. Dark fuliginous, mouth parts 

 paler; large basal joint of antenmc fuliginous; second joint blackish; 



1 See these Proceedings, Vol. XI, p. 399. 



