NATURAL SCIENCES OP PHILADELPHIA. 323 



20. Anchomenus angusticoUis\ Kirby agrees with the common 

 race of Platynus sinuatus, except that the basal angles of the 

 prothorax are less prominent, the basal impressions and the ely tral 

 strife less punctured. The specimen of P. stygicus Lee. shown 

 me on a former visit to the British Museum was erroneously 

 labelled, but was not Kirby 's type; the synonym given in Annals 

 and Magazine of Nat. History, Nov. 1870, p. No. 5, is therefore 

 incorrect. 



21. A. EXTENSicoLLis. Mr. Kirby's specimens belong to the 

 elongate bluish-green race, without any elevation in the basal im- 

 pressions of the prothorax, 



22. Agonum affine Kirby is Harrisii Lee. 



23. A. PiciPENNE Kirby. Var. (a) is a species as large as P. RU- 

 FiCORNis Lee, with the prothorax equally elongate, and the sides 

 not explanate or reflexed ; it seems to be lutulentua Lee. 



24. A. picij^enne, xavs. (c and d) are ruficornis Leg, 



25. A. sordens Kirby, (a) could not be found ; (b) seems to be 

 fuscescens Chaud. 



26. A. SEMiNiTiDUM Kirb3^ I learn from Mr. C. 0. Waterhouse 

 that this species differs from P. chalceus Lee. by the elytra being 

 shorter, more shiniug, and less parallel at the sides. 



27. Stereocerus similis Kirby, is the species of Amai'a described 



as FeRONIA HiEMATOPUS Dcj. 



28. Cyrtonotus rufimanus Kirby has the sides of the prothorax 

 distinctly sinuate behind, and the hind angles prominent. It 

 seems (without comparison) to be A. lacustris Lee. C. brevila- 

 bris Kirby is a specimen of the same species with the labrum 

 retracted under the epistoma. 



29. G.convexiusculus | Kirby is A. laticollis Lee. The Euro- 

 pean species is narrower, with the prothorax much more narrowed 

 behind and more sinuate on the sides, as in A. Jacobins Lee. 



30. C. LATiOR Kirby is A. libera Lee, = Isevistriata Putzeys, 

 a Brad3'tus with sides of prothorax rounded, hind angles obtuse 

 and not rounded. 



31. Amara impuncticollis Say. Mr. Kirby's specimens have 

 the sides of the prothorax more oblique and less rounded, and the 

 basal fovene more distinct than in the specimens sent by Mr. 

 Sprague for comparison, but I do not think that it is a diflerent 

 species. 



32. A. vulgaris % Kirbj^, is a rather elongate flattened species 



