THE GROI'KD BEETLES. 99 



iiietatliorax long; tlorsal piiiiclurcs Ihivr; hind tarsi with three or 

 four joints grooved on outer side ; bjisal impressions of thorax deep, 

 single ; wings wanting except in erytliropus. 



KEY TO SPECIES OF GROUP 1). 



(/. Scutelhii- stri.i waiitiug; thorax subquadratir,', hiud angles stmiigly 

 rounded. 142. ekvthropiis. 



<((i. Seutellar stria lung. 



b. Elj'tral slrhe nut punctured; hind angles subreetauguhir, slightly 

 prunnneut. 143. i'atruelis. 



hb. Basal half of elytral sti'ia- punctured; hind angles obtuse. 



144. FEMORA LIS. 



142 (5S5). PTEROsTicHrs ERYTHROPCS Dej.. spec. Ill, 1827, 



240. 

 Elongate-oval. Black, strongly shining; antemiiie and 

 legs reddish-brown. Thorax nearly square, sides feebly 

 curved, widely depressed near the hind angles, VA'hich are 

 strongly rounded; basal impressions and elytral strite not J 

 punctured. Length S-S.5 mm. (Fig. 61.) 



Throughout the State, frequent; usually beneath 

 rubbish in sandy localities near water. Probably hi- (Aftef'Leng). 

 bernates. IMarch 10-November 5. 



143 (587). Pterosticiius patruelis Dej., Spec. V, 1829, 759. 



Elongate, slender, subcylindrical. Black, feebly shining ; antennae and 

 legs dark reddish-brown. Thorax feebly narrowed behind, sides mod- 

 erately rounded, basal inqn-essions sjiarsely punctured. Elytral striae deep; 

 intervals nearly fiat. Length 7..5 nnu. 



Throughout the State; more frequent in the northern half. 

 March 26-October 25. 



*144 (588). Pterostichus eemoraiis Kirby. Faun. Bor. Amer., IV, 1837, 

 31. 

 Resembles the preceding, but the form is less slender, the hind angles 

 of thorax more obtuse and the elytral strijie finely punctured at least as 

 far as the middle. Length 7.5 mm. 



Throughout the State; common. Hibernates as imago. Feb- 

 ruary 6-December 18. 



XXV. EvARTHRUs Lec. 1852. (Gr., "good + joint.") 



Black beetles of medium or large size, possessing the characters 

 of the tribe Pterostichini as above given. Last joint of labial palpi 

 shorter than the next to last, the latter with several long setse in 

 front. Elytra with rounded humeri and one dorsal puncture, lo- 

 cated near the third stria just behind the middle. Hind tarsi not 

 grooved on outer side. Wings wanting; mandibles striate. Pro- 

 sternum not margined behind. 



