1918.] NATURAL SCIENCES OF PHILADELPHIA. 187 



indicated, no trace of lateral carinse on shoulders; transverse sulci 

 distinct, but rather finely and narrowly impressed, metazona hardly 

 more than a fourth the length of the remainder of the pronotum: 

 lateral lobes with their greatest depth subequal to two-thirds of the 

 greatest dorsal length of the same; cephalic margin oblique, ventro- 

 cephalic angle rounded obtuse, ventral margin distinctly arcuato- 

 emarginate oblique cephalad, median angle rounded obtuse, caudal 

 section of the ventral margin oblique arcuato-truncate, ventro-caudal 

 angle broadly rounded obtuse. Tegmina and wings absent. Proxi- 

 mal abdominal segment with distinct lateral subcircular auditory 

 tympani. Prosternal spine moderately elongate, erect, conical acute: 

 interspace between the mesosternal lobes quadrate, smaller than one 

 of the lobes; metasternal lobes narrowly separated caudad: surface 

 of mesosternum and metasternum more or less shagreenous, the ceph- 

 alic half of the mesosternum strongly and closely so. Disto-dorsal 

 abdominal segment with the furcula represented by a pair of the 

 merest nodes, between which the segment is moderately emarginate: 

 supra-anal plate elongate trigonal, apex narrowly rounded, lateral 

 margins with a weak shoulder at two-fifths the length from the base, 

 surface with a broad medio-longitudinal sulcus on proximal half, a 

 pair of inter-marginal, straight, converging impressions, which on 

 account of the shoulder on the lateral margin are more removed from 

 the latter proximad than distad, and the distal area enclosed by the 

 impressions faintly elevated and its surface weakly impressed: cerci 

 short, rather robust, when seen from the dorsum compressed, having 

 the proximal half straight and the distal section directed obliquely 

 meso-caudad, when seen from the lateral aspect having the proximal 

 half deep and weakly narrowing distad, a short, blunt tooth present 

 ventrad on the external face at the point of flexure of the cercus, the 

 distal half narrowing to the blunt but acuminate apex, ventral margin 

 of the distal half with a distinct, blunted but acuminate tooth, this 

 much like the true apex in character : subgenital tooth simple, hardly 

 produced, free margin distinctly emarginato-truncate mesad, the 

 lateral angles being low nodes. Cephalic and median femora robust, 

 inflated, the median ones particularly so. Caudal femora about 

 twice as long as the head and pronotum together, moderately robust, 

 the greatest width contained three and one-half times in the greatest 

 femoral length; dorsal carina with a series of distinct, spaced serra- 

 tions and an intercalated series of serrulations, ventral carina simi- 

 larly but more decidedly armed, particularly distad; pagina evenly 

 and deeply engraved; genicular lobes with the distal portion of the 

 14 



