44 GEO. H. HORN, M. D. 



It is well also to give a word of caution in the interpretation of 

 the meaning of the position of the dorsal punctures. A single speci- 

 men should not have too much confidence bestowed upon it, as there 

 is apt to be very annoying variation in the position of the punctures, 

 especially of the second. It would seem that a careful reduction of 

 the number of species would be more nearly true to nature and 

 render the separation of them far less difficult. These remarks 

 ai)ply more particularly to the black species of the Agonum grou}) 

 related to corvus, melanurins, etc. 



PERIGOIVA Lap. 

 The recent caj)ture of numerous specimens of one of the species 

 of this genus by Mr. Ulke, near Washington, enables me to assert 

 that two valid species exist as originally stated by LeConte. These 

 may be separated as follows : 



Head alone piceous ; elytra slightly oblong iiigriceps. 



Head and thorax piceous; elytra oval and more convex pallipenilis. 



P. iiigriceps Dej. ( Tachys) ; Trechicus umbripennis Lee. 



One of the Dejean types is now in my collection. Its general 

 aspect is that of some depressed Tachys as corruscits. 



Some discussion has been held comparatively recently in which 

 M. Fauvel has taken an important part regarding this insect. From 

 the comparisons made by him nigricepe. is widely distributed; speci- 

 mens have been conj pared from such widely distributed regions as 

 United States, Madagascar and Japan. In fact a specimen of F. 

 japonica now before me does not appreciably differ from those taken 

 l)y Mr. Ulke. 



P. pallipeiiuis Lee. {Trechicus). 



The head and thorax are piceous-black and shining, the elytra 

 piceo-testaceous variable in intensity. The elytra are more oval than 

 the preceding species and more convex. The form is that of a di- 

 minutive Treehns ovipennis. 



Occurs in Pennsylvania, Iowa, District of Columbia and North 

 Carolina. Evidently more widely distributed than nigrieeps, but 

 rather rare. 



PINOOY'TKS Horn. 

 In the "Classification of the Coleoptera of North America," I 

 would suggest a change in the charactei's used to separate the Ly- 

 rosomini and Pinodytini as follows : 



