300 
Mas : prothorace disco viridi-seneo , nitidulo ; ungui- 
culis subtus basi dentato-dilatatis ; femorum antico- 
rum macula holosoricea rninore , subtriangulari. 
Femina : prothorace disco vix nitido ; femormn anti- 
comm macula holosericea basali subquadrata. 
Obs. Species a sequente magnitudine , prothorace lateribus 
fortius rotundato-dilatatis , basin versus sinuatis , an- 
gulis posticis acutiusculis , disco crebre umbilicato-ru- 
goso , sulcis intermediis fortius angulato-flexuosis; ely- 
tris interstitiis latis , alternis subelevatis , pone basin 
transversim late subimpressis ; tibiis anticis margine 
exteriore denticulis 2 • 3 paullo magis prominentibus ; 
tarsis posticis articulis 2—4 sensim longitudine de- 
crescentibs , 2:o 3:o vix sesqui longiore ; abdomine 
segmento ultimo ventrali margine postico evidenter 
serrulato optime distinguenda. 
5 b. H. eequalis n. sp. : Oblongus, subtus fuseus , capite 
prothoraceque viridi-mneis , nitidis , hoc disco rnedio 
obsolete rugoso , sulcis intermediis sat fortiter flexu- 
osis ; ely tris griseis , subrenois , fortius punetato-stria- 
tis , interstitiis sat latis , alternis haud elevatis. Long. 
2— 2 i- lin. 
H. aquatico similis , sed semper minor , prothorace 
disco medio obsolete umbilicato-rugoso , sulcis intermediis 
minus fortiter angulato-flexuosis , lateribus basin versus pa- 
rum sinuatis, angulis posticis rectis, elytris striis minus 
latis , alternis haud elevatis , tarsis posticis artieulo 2:0 3:o 
fere duplo longiore , hoc quam 4:0 parum longiore , seg- 
mento ultimo margine postico fere intogro bene distinetus. 
