1904.] NATURAL SCIENCES OF PHILADELPHIA. 515 



smaller size, more elongate and posteriorly constricted head, more 

 elongate ninth dorsal abdominal segment, heavier cerci and more pro- 

 duced inferior angle of the subgenital opercle. No close relationship 

 exists with B. dorsuaria Stal or turgida (Westwood). 



Size medium; form very elongate; surface smooth. Head dis- 

 tinctly longitudinal, the posterior portion with a marked but 

 gradual constriction; eyes elliptical, not prominent; ocelli absent; 

 antennae with the basal joint longitudinal, depressed, external margin 

 not distinctly sulcate. Pronotum slightly shorter than the head, 

 slightly expanded posteriorly; cruciform impression weak, the central 

 portion more apparent than the extremes; lateral margins distinctly 

 cingulate. Mesonotum very slender and elongate, equal to the median 

 femora. Metanotum (with median segment) two-thirds the length of 

 the mesonotum; median segment slightly shorter than the remaining 

 portion of the metanotum and slightly longer than the j&rst abdominal 

 segment. Abdomen with all the six basal segments quite elongate, 

 the fifth slightly and the sixth distinctly shorter than any of the basal 

 four; seventh, eighth and ninth segments subequal in length, the sev- 

 enth expanded apically, the eighth constricted apically, the ninth sub- 

 equal and with the apical half bearing several distinct longitudmal 

 sulci, apical margin sinuato-truncate ; cerci simple, straight, somewhat 

 compressed, slightly shorter than the ninth dorsal abdominal segment; 

 subgenital opercle compressed, not exceeding the apical margin of the 

 eighth dorsal segment, inferior angle produced into a distinct claw-like 

 point. Anterior femora equal to the mesonotum, pronotum and half 

 of the head in length, straight, distinctly carinate, basal flexure short 

 but distinct ; tibiae exceeding the femora by the length of the pronotum, 

 very slender, carinate; metatarsi slender, exceeding the remaining 

 tarsal joints in length, superior surface with a narrow and rathei- in- 

 distinct longitudinal sulcus. Median femora equal to the mesonotum 

 in length, slightly arcuate; tibiae exceeding the femora in length; 

 metatarsi slightly shorter than the remaining tarsal joints, sulcus as hi 

 the anterior metatarsi. Posterior femora reaching to the middle of the 

 fifth abdominal segment, slender, very slightly arcuate; tibiae slightly 

 exceeding the femora; metatarsi subequal with the remaining tarsal 

 joints, no distinct sulcus above. 



General color drab, suffused on the apex of the abdomen with, and a 

 broad lateral streak on the head cream color; eyes mottled cinnamon 

 and umber; postocular streak on head and pronotum hair-brown; 

 limbs drab, more or less distinctly annulate with broad bands of dull 

 brownish, some of the pale annuli wood-brown. 



