1865.] . 259 



A single specimen was found by me in Northern Illinois. It could 

 be taken for a •' riprarius," but the present species is much more slen- 

 der, the last joint of the antennae is not as long, and the tibise are not 

 armed with a spine. 



12. Tychus bythinioides, n. sp. — Piceus, tonientosus, cajjite bifoveato, foveis 

 sulco angulatiiu eonjuuctu.s, aiiteiinis articulo prinio longo cj'lindrico, seeiindo 

 globoso iiiagno, iiitermodiis minimis, Svo 9no tranversis, ultimo maximo ovato; 

 palpis articulo 3tio globoso, ultimis securiformi, thorace compaiiulato, sulco trans- 

 verso basali, elytris punetatis, pedibus testaceis. Long 1.1 m. m. 



Thi.s remarkable insect furnishes the connecting!: link between the 

 Pselaphi and the Bryaxis. The form of the head and body forces it 

 in the first division; the form of the palpi, antennae, and the thoracical 

 sulcus, are borrowed from the genus " Bythinus." Even the head is 

 touched by a resemblance of the Bryaxes by having two small grooves 

 on the vertex between the eyes, with furrows running forward to the 

 fro ital notch, which divides the antenna! tubercles. The antennae 

 h ive the first joint very long, cylindrical, the second globular, the fol- 

 lowing six joints are small, globular, all conjointed as long as the first 

 two, the ninth and tenth are transverse, broad, the last ovate, as long 

 as the first and as broad as the tenth. The thorax is bell-shaped, with 

 a basal, arcuate, transverse sulcus. The elytra are punctured, de- 

 pressed, tomentose, with entire sutural striae, and two basal impressions 

 in the place of the dorsal strife, which are wanting. The abdomen is 

 short tomentose, margined ; the tarsi have one claw. 



A single specimen was found near New York city. It joins, in affi- 

 nity, respecting the fo;-m of the autenna3, next to Bjthuius carinatus 

 nobis. 



13. Trimium impunctatum. n. sp.— Fuscum, Iseve, pubescens, capite foveis ob- 

 lougis duabus, vertice convexo, thorace ovato, foveis lateralibus minus Impressis 

 elytris convexiusculus, lateribus arcuatus, latitudiue longiore palpis articulo 

 tertio globoso, ultimo minore ovato, ad basin truncate. Long 1.3 in. m. 



The stature of this insect is quite a peculiar one. The elongate 

 form of the body is marked by a very narrow waist and neck. The 

 head is longer than broad, with two ample oblong grooves in the place 

 of the lateral sulcus. The antennae are shorter than the head and tho- 

 rax conjointed, the first joint is long, obconical, the second very short, 

 broader than the following, the adjoining six joints are very small, 

 transverse, the ninth and tenth are gradually broader, lenticular, tran.s- 

 verse, the last is very large ovate. The maxillary palpi are small, the 

 third joint larger than the last, which is truncate at the base. The 

 thorax is oblong convex, the sides equally curved, constricted at the 

 the base and tip, widest in the middle, with three impressions in the 



