DESCRIPTIONS OF NEW SPECIES. 93 



MAL.THODES KIESENWETTER. 



333. IH. f Uliginosus. Elongatus, fuscus, tenuiter cinereo-pubescens, 

 thorace latitudine breviore, antrorsum paulo latiore, marginato, angulis 

 anticis rotundatis, apice utrinque oblique truncato, basi recto ; elytris 

 rugosis, longiusculis ; pedibus pallidioribus, antennis basi testaceis, 

 articulis 2 et 3 aequalibus. Long. '17. 



Mas, segmento dorsali penultimo postice utrinque sinuato, angtilis posticis 

 prominulis ; ultimo prolongato, angusto apice acut emarginato, supra 

 longitudinaliter concavo ; penultimo ventrali late profunde emarginato ; 

 ultimo pallicliore elongate, vage canaliculate, postice in coruua duo 

 cylindrica ascendentia, et divergentia producto. 

 Femina, segmento ventrali 6to fisso, lobis rotundatis. 



Lake Superior ; three specimens. A rather large species, easily 

 known by the sexual characters : the last dorsal segment of the 

 male is much prolonged, narrow, and concave above, emarginate 

 at tip, with the lobes rounded ; the penultimate ventral segment 

 is very deeply and broadly emarginate ; the last ventral prolonged, 

 broadly canaliculate, produced behind into two cylindrical horns, 

 ascending so as to pass each side of the prolonged last dorsal 

 segment. 



The females of different species of this genus resemble each 

 other in such manner that, as already observed by Kiesenwetter, 

 it is very difficult to distinguish them : the sexual characters of 

 the male are very extraordinary, and very easily recognized in 

 each species. 



334* M. spado. Nigro-fuscus, tenniter cinereo-pubescens, capite tho- 

 race latiore, ore rufo, thorace latitudine duplo breviore, undique tenuiter 

 marginato, lateribus rectis angulis omnibus rotundatis, elytris rugosis, 

 ad medium abdominis abbreviates. Long. -09 -13. 



Mas, segmento dorsali ultimo apice rotundato ; ventrali penultirno late 

 profunde emarginato, ultimo conico, haud producto, apice parum emar- 

 ginato ; antennis corpore brevioribns. 



Femina, segmento ventrali penultimo late emarginato. 



Variat capite obscure rufo, fascia pone oculos nigricante. 



Pennsylvania; five specimens. The elytra are somewhat shorter 



than in the other species, being only one-half the length of the 



abdomen ; the 2d joint of the antennae is about equal to the 3d in 



the female, and a little shorter in the male. 



The penultimate ventral segment is feebly emarginate in the 



female, but deeply semicircularly emarginate in the male ; the last 



