Scorpions and Centipedes from Madras. 247 



Otostigma nudum, sp. n. (PI. XII. figs. 3-3 b.) 



Colour of tergites pale olivaceous, of sternites testaceous, 

 of head, first tergite, and maxillary sternite rufous, tarsi with 

 pale green tint. 



Head-plate ovate, long, longer than wide, not sulcate. 



Antennae, short, composed of seventeen segments, whereof 

 the proximal three are naked and the rest pubescent. 



Maxillary sternite relatively long, sparsely punctured, and 

 marked with a shallow, median, longitudinal sulcus; pro- 

 sternal plates long and produced far forwards, so that the 

 anterior edge is almost on a level with the apex of the basal 

 tooth of the maxillipede, the two almost in contact and each 

 armed with four poorly developed teeth ; the basal tooth of 

 the maxillipede sharp and bearing on its inner side a small 

 tooth ; claw stout and curved. 



Tergites very minutely and closely punctured ; from the 

 fifth bisulcate, from the eighth marginate, those in the middle 

 and posterior half of the body wrinkled laterally and in the 

 middle. 



Sternites conspicuously trisulcate, being marked with the 

 usual lateral sulci and, in addition, with a median, longitu- 

 dinal, more or less abbreviated sulcus. 



Anal somite. — Sternite with posteriorly converging lateral 

 margins and lightly concave posterior margin; pleurce 

 covered with relatively large pores, the process short, stout, 

 slightly incurved, and terminated by twospines, not armed with 

 lateral or superior spines ; tergite not sulcate and not poste- 

 riorly impressed ; legs short and stout, femur armed with 

 seven spines — two on the upper-inner edge, two on the under- 

 inner edge, and three on the under-outer edge ; upper surface 

 of femur, patella, and tibia obsoletely and longitudinally 

 sulcate ) tarsus not armed with spur, claw furnished with 

 two basal spines. 



Legs with tarsal segments unarmed ; claws spined. 



Length of body 52 millim. 



In possessing trisulcate sternites, larger pleural pores, and 

 forwardly-produced prosternal plates this species is allied to 

 0. geophilinum, Haase ; but it differs markedly from all the 

 Old- Y\ orld species of the genus known to me in having the 

 tarsal segments of all the legs unspined. 



A single specimen only was sent. 



Otostigma rufce-ps } sp. n. (PI. XII. figs. 2-2 b.) 



Colour of tergites somewhat grass-green, legs and sternites 

 paler ; head-plate, with exception of the frontal area, which is 



