NO. 15150. THE DECTICIN^ OF NORTH AMERICA— CA UDELL. 397 



as long- as the basal width and not extending- outside of the cavity 

 formed by the subg-enital phite and the last abdominal segment, the 

 basal spine noticeable only when the. cerci are removed or pushed 

 laterally far back; subgenital plate long and triangularly incised and 

 bears a pair of movable, club- like apical styles, two times as long as 

 broad. Legs short, posterior femora less than two and one-half times 

 as long- as the pronotum, parallel on the apical two-Hfths, unarmed; 

 coxal spines of the anterior legs broad and sharp; anterior tibiae 

 armed on the outer side above with three spinies, unarmed on the inner 

 side. Posterior tibia^ with the plantulse very poorl}^ developed. 



Color light yellowish brown; lateral lobes of the pronotum infus- 

 cated quite uniformly and heavily on the disk, the lower margin, the 

 posterior third, and a narrow margin along the anterior edge being 

 light yellowish. There is a row of black spots down each side of the 

 abdomen and the outer face of the posterior femora is striately infus- 

 cated. 



Measurentents. — Length, pronotum, 5.5 mm.; elytra, beyond the 

 pronotum, 0; posterior femora, 12; cerci, 1.5. 



Type. — In the Scudder collection. 



SpeGlriienii cnimhied. — One male, Arctic America (Kennicott). This 

 species was mentioned, but not described, by Doctor Scudder." It is 

 certainly a new species, as shown by the short posterior femora and 

 other less obvious points of difference.- 



IDIONOTUS SUBCARINATUS, new species. 



Deser'qjf'ion. — Female, male unknown. Head medium, scarcely 

 broader than the anterior portion of the pronotum; fastigium some- 

 what prominent, a little ])roader than the basal segment of the antenna, 

 aliout one-third as broad as the interocular space; eyes scarcely promi- 

 nent, nearly round, very slightly flattened anteriorly; antenme, except 

 the basal segment, very slender. Pronotum moderatelv large and 

 posteriori}' produced over the base of the abdomen so as to com- 

 pletely conceal the organs of flight; lateral lobes well developed, 

 declivate, posteriorl}'^ broadly sinuate; lateral carinte dull, but distinct, 

 made more distinct by the coloration, persistent, considerably bowed 

 inwards in the anterior half, the posterior portion of the disk 1)eing a 

 third broader than the narrowest portion; median carina not indicated; 

 pronotal disk broadly convex, truncate antei'iorly and posteriorly, 

 without transverse carina^ marked in the center with a broad obscure 

 transverse depression. Prosternum unarmed. Organs of flight wholly 

 concealed beneath the pronotum. Legs moderately stout, the poste- 

 rior femora three times as long as the pronotum and much swollen on 

 tlie basal two-thirds; all the femora unarmed; anterior tibia^ armed 

 above on the outer side only with three spines, below on both sides; pos- 

 es Canadian Entomologist, XXVI, 1894, p. 282. 



