190 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



cipal characters in common, namely, the spiracles of the 

 posterior abdominal segments are placed near the lateral mar- 

 gins. The genus Nannium was originally described by Dr. 

 E. Bergroth,*who based his genus on three South American 

 species. Later on, another Species has been described by Dr. 

 G. C. Championf from Guatemala, Central America. X<>\\ 

 it is interesting to add also a Xorth American species, foun ! 

 as far north as Cincinnati, Ohio, to this genus Nannium, 

 hitherto only known from tropical and semi-tropical regions. 



This neat little species resembles Nannium [>an'iun Uergr.. 

 but it appears somewhat stouter and the segments of abdomen 

 are equally long in the middle, while in the other species the 

 fifth abdominal segment is decidedly longer than the preced- 

 ing segments. 



I am indebted to Dr. C. Dury for kindly presenting me with 

 three specimens of this new species, which he had found by 

 sifting earth from near an old decaying tree-stump in the 

 vicinity of Cincinnati, Ohio. 



Aradus borealis, new species. 



Body broad, ovate, dark brown and finely granulate. I lead closeh 

 set into the thorax, hardly longer than broad, two deep impressions 



at basal part, a longitudinal ridge at the in- 

 ner side of each eye, with a small tubercle 

 in front; apical process of head broad at 

 base, considerably tapering towards the tip. 

 extending a little beyond the base of second 

 nntennal joint ; antenniferous processes prom- 

 inent, straight at the outside and very 

 acute at the tip, reaching near to tin- 

 apex at the basal joint of the antennae. Eyes 

 globular, protruding sideways somewhat be- 

 yond the anterior margin of pronotum. Anten- 

 nae stout, finely granulated, as long as head and 

 thorax taken together: basal joint extremely 

 short; second joint one-third longer than the 

 two apical ones united, gradually narrowing 

 toward the base and slightly bent outwardly: 



third joint cylindrical, longer than the terminal one, which is thinner 

 and whitish at tip. Rostrum touches the mesostermim ; first joint 

 longest, extending to the base of head; the second joint reaches the 



^Diagnoses of Some New Aradid;e, by E. Uergrotli (The Ento- 

 mologist ^Monthly Magazine, vol. xxxiv, p. 100, 1898). 

 fBiologia Centrali- Americana, p. 84, 1897-1901. 



