1904.] NATURAL SCIENCES OF PHILADELPHIA. 59 



ginate apex of the ninth dorsal abdominal segment, the very different 

 cerci, and the unarmed limbs. 



Size medium; form very slender and elongate; surface subglabrous. 

 Head rather elongate, narxowed posteriorly; eyes subcircular, not 

 prominent; antennae slightly exceeding half the length of the body, 

 filiform, basal joint moderately depressed. Pronotum about twice as 

 long as broad. Mesonotum about equal in length to the posterior 

 femora. Metanotum (with median segment) not quite three-fourths 

 the length of the mesonotum ; median segment two-thirds the length of 

 the metanotum itself. Abdomen with six basal segments subequal 

 in length; seventh, eighth and ninth segments sharply tectate. the 

 seventh slightly exceeding either of the others in length, ninth with the 

 apical margin with a liroad rounded median emargination, exposing 

 the rounded apex of the supra-anal plate; cerci elongate, depressed, 

 paddle-shaped, slightly exceeding the ninth segment in length, apex 

 rounded; subgenital opercule short, not reaching to the apical margin 

 of the eighth dorsal segment, apex triangular produced, the preapical 

 portion developing a recurved ungual process. limits of moderate 

 length, strongly carinate and compressed. Anterior femora slighth^ 

 exceeding the mesonotum in length ; tibise slightly exceeding the fem- 

 ora in length; metatarsi slightly exceeding the remaining tarsal joints 

 in length. Median femora about five-sixths the length of the meso- 

 notum ; tibiae about equal to the femora in length ; metatarsi equalled in 

 length by the remaining tarsal joints. Posterior femora equal to three 

 and a half of the fourth basal abdominal segments; tibise equal to the 

 four basal segments; metatarsi exceeding the remaining tarsal joints 

 in length. 



General color yellowish-brown (probably green in life), very pale on 

 the anterior limbs. 



Measurefnents. 



Total length, 78 mm. 



Length of pronotum 3 " 



Length of mesonotum, 18.1 " 



Length of metanotum (including median segment), . . . 13.5 " 



Length of abdomen (including cerci), 41.2 " 



Length of anterior femora, 20 '' 



Length of anterior tibise, 21.5 " 



Length of median femora, 15.5 " 



Length of posterior femora, 19 " 



Genus ONCOTOPHASMA n. gen. 



Type. — Bostra martini Griffini. 



Body of medium build ; pronotum for the greater part slenderer than 

 the abdomen. Metathorax strongly inflated and rugose; the tumid 



