4 "20 Mr. AV. L. Distant 021 Pentatominai. 



blunt nearly median eminence. The lower and more newly 

 formed portion of tiie dental plate is marked with less distinct 

 transverse furrows, which gradually become more closely 

 ajiproximated near the inner margin. The greater part of 

 tlie fossil is broken away from the matrix, thus exposing its 

 inner face (tig. 2 a). This is roughened by small irregular 

 ridges radiating from the attenuated outer end to the com- 

 paratively wide inner margin. 



Compared with this new fossil all the European species of 

 ]>eUodus hitherto known are very small and readily distin- 

 guished both by the shape of the dental plate and its super- 

 ficial furrows. Nor do any forms of Deltodits from the 

 (■arboniferous of North America appear to resemble very 

 closely the specimen now described *. Perhaps Deltodus 

 propinquus, from the Coal Measures of Illinois, exhibits most 

 similarity, though this is marked by slight cross-grooves 

 cutting the transverse furrows, while its hinder wing is more 

 distinctly defined. The dental plate from the Yoredale Rocks 

 of North Yorkshire may therefore be regarded as the type of 

 a new species, DeJtodus Cro/tonij named in honour of its 

 discoverer. 



EXPLANATION OF PLATE X. Figs. 2, 2 a, 2 b. 



Fiij. 2. Deltodus Croffoni, sp. u. ; liinder left lower dental plate, oral and 

 attached (2 a) faces and postero-lateral niar^zin (2 6), three- 

 quarters nat. size. — Lower Carboniferous (Yoredale Rocks); 

 Blackthorn Farm, Long Preston, N. Yorkshire. [British Mu- 

 seum, no. P. 8697.] 



a., antero-lateral margin ; i., inner margin ; p., postero-lateral margin. 



LVII. — Rhynchotal Notes. — IV. Heteroptera : Penta- 

 tomina; {part.). By W. L. Distant. 



[Concluded from p. 307.] 



Genus Beachycoris. 

 Brachycoris irisignis, sp. n. 



Head and pronotum black, very coarsely punctate and 

 rugulose ; head with two small central spots near base and 

 pronotum with three transverse spots near anterior area ochra- 

 ceous. Scutellum ochraceous, sparingly but coarsely punctate 



* For complete bibliography see Catal. Foss. Fishes Brit. Mus. pt. i. 

 (1889) pp. PJ5-201. 



