23-4 I' will.'* i\ .--n^ tiscid.t;. 



^1. medial IIS Say has the same i-atM4c as llic dtluT two s[)C('ies, 

 and should tlicivfoiv occur in thic State. 



457 (14'j:;). AciLirs fuateunis llarr., New Eng. Far., 1820, S. 



Close to scmisiilCiHtiis. but a little larger, darker and mure densely 

 punetured. Black lines of tlmrax breader; femora nearly black. Lenytli 

 ]'>-14.r> mm. 



Marion. Putnam and Vigo counties; frequent. March 14-Au- 

 uiist 12. In coifn on the earlier date, motionless, heads downward 

 and ventral sides together. When disturbed they dived quickly 

 and hid in the leaves and trash at the bottom of the water. 



XXII. TiiEKMONECTES Esch. Is33. (Gr., "a warm spring -f 



swimmer. ' ' ) 



Meditnn-sized, rather convex species resembling Acilius in ap- 

 pearance, but having the up])er surface i)olished, smooth, or with 

 but one to three dorsal rows of punctures; thorax without side mar- 

 gins; prosternal jirocess broad and short; hind tarsal claws unequal. 

 The front tarsi of the males bear two en- three larger basal and 

 numerous small unequal disks on the lower side. The basal halves 

 of elytra of females are marked with numerous short, deep elongate 

 punctures. Two species occur in the State. 



4.1S (14!)5). TuERMONECTES OKNATicoi.Lis Anbe, Spec. Gen., VI, 1838, 140. 

 Ovate, snbeonvex. Above dnll yellow ; bead witb vertex and an M- 

 sba]}ed mark black; tborax witb two transverse black lines, the front one 

 the narrower; elytra marked witb many small black more or less continent 

 dots, and an indistinct black Itar beliind tlie middle; nnder snrface reddish- 

 brown. Elytra each witb twe discal rows of rather distinct distant pnnc- 

 tnres. Length ll.C)-!.") n\m. 



Vigo County; rare. i\Iay 28. 



459 (1490). TuERMONEcnEs basilaris Harr., N. Eng. Far.. 182S, 8. 



Ovate, snbeonvex. Abr.ve black; head in front and a transverse line 

 on the vertex dnll yellow; Ihnrax with tlie sides and a narrow discal bar 

 of the same color; elytra with the margins, a snb-basal cross-bar and some 

 vague markings on the sides yellowisli : nmicr snrface reddish-brown or 

 piceous, the front and middle legs paler. l';iytra pnnctate as in onKiticulHs. 

 Length 9-10 mm. 



Lake, ^larshall and Putnam counties; scarce. May 2()-Au- 

 gust 15. 



XXITT. (lK.\pn()ni<:RT.:s Ksch. 1S:38. (Gr., 'Svrite + skin.") 



This genus is close to Thi rmoiiccles. Tin? males have the front 

 tarsi as there, l)ut have also the middle tarsi dilated and bearing two 



