INSECUTOR INSCITI^ MKNSTRUUS 11 



to the apical three segments which are moderately expanded, 

 especially the seventh and eighth ; the terminal segment is 

 apically notched, about as broad as long, rounded above with 

 a distinct straight median carina and a very obscure roundly 

 divergent ridge on each side; supraanal plate concealed, as 

 are also the cerci. which are stout, subcylindrical, apically 

 swollen, incurved organs, apically rounded and covered with 

 short hairs ; operculum^ prominent, short. Legs slender ; all 

 the tibiae and the posterior and intermediate femora with 

 one to three or four small expansions above ; tibise without 

 apical arolia beneath ; tarsi moderately slender, the metatarsi 

 distinctly shorter than the rest together except that of the 

 hind leg where it is about as long; femora unarmed beneath, 

 the anterior ones a little curved basally and somewhat longer 

 than the mesonotum ; posterior femora reaching to the tip 

 of the sixth abdominal segment. 



Measurements. — Length : Total, 55 mm. ; mesonotum, 14 

 mm. ; metanotum, 8.5 mm. ; median segment, 1.5 mm. ; an- 

 terior femora, 17 mm.; middle femora, 12 mm.; hind 

 femora, 16 mm.; anterior tibise, 20 mm.; middle tibiae, 15 

 mm. ; posterior tibiae, 21 mm. 



Described from one $ , December 12, 1906. Iconnicoff. 



Type in collection of Iconnicofif. 



Acanthoclonia flavicornis, new species. (PI. I, figs. 6,7.) 



This form is allied to A. immanis Scudder, with the type 

 of which it has been compared, but it is clearly distinct from 

 that species. The yellow antennae are apparently distinctive, 

 such coloration not being mentioned in the descriptions of 

 allied species. 



Description ( $, the 9 unknown). — Head elongate, diag- 

 onally attached and the surface deeply rugose and tuber- 

 culate, the occiput armed with a pair of divergently erect 

 lamellate expansions which are twice as long as broad and 

 armed apically and along the margins with stout erect spines ; 



' Though not exactly homologous, the ventral modification near the end of the 

 abdomen of both sexes is designated by this term. 



