100 ctenizidjB. 



4th leg. Anterior median eyes much larger than the rest, almost 

 in contact. Palpi long; tibia much thicker than patella; tarsus 

 elongate, apically truncate ; spines of palpal organ sinuous, broad 

 at base, then abruptly bent backwards, one rising from the 

 extremity of the bulb, the other near its middle. Legs of 

 posterior pairs furnished distally with a few spinules ; superior 

 claws armed with about 5 teeth. 



Measurements in mm. — Total length 6, carapace 2*5, palp 4*25, 

 1st, leg 9-5, 2nd 8-8, 3rd 8-2, 4th 10-75. 



Loc. Burma : Bhamo {Fen). 



Family CTENIZID^. 



Mandibles furnished with rastellum, sometimes supported on a 

 strong prominence. Co.ra of palpus without large maxillary 

 process. Sternum with anterior sigilla large and encircling base 

 of labium ; posterior pair large and remote from margin ; rarely 

 absent. Tarsi without ungual tufts ; with 3 claws. Spinning- 

 mamilice 4 in number ; the anterior pair contiguous ; posterior 

 pair short or of moderate length. 



Distribution. Temperate and tropical parts of the world, lying in 

 general between 45° 1ST. lat. and 45° 8. lat. 



To this family belong a great majority of the species commonly 

 spoken of as Trap-door Spiders. 



The characters of the Indian genera may be briefly tabulated as 

 follows : — 



a. Anterior lateral eyes in middle of anterior edge 



of carapace well in advauce of remaining 



eyes. [p. 1G1 



a 1 . Tibia of 3rd leg not excavated above Acanthodon, 



b 1 . Tibia of 3rd leg excavated above at base . . Heligmomerus, 



b. Anterior lateral eyes widely separated, at most [p. 164. 



only a short distance in advance of anterior 

 medians. 

 ar. Thoracic fovea strongly procurved. 



a 3 . Tarsi and protarsi of legs scarcely or not 



scopulate, and strongly spined laterally ; 



apical segment of posterior mamilbe short. 



«'. Tibia of 3rd leg excavated above; 



spines of rastellum set on prominence. . Conothele, p. 165. 

 b'. Tibia of 3rd leg not excavated above ; 

 spines of rastellum not set on promi- 

 nence ACATTYMA, p. 166. 



6 s . Tarsi and protarsi scopulate, weakly 

 spined, apical segment of posterior spin- 

 ners long. [p. 168. 



a 5 . Sternum with central depression Atmetociiilus, 



b\ Sternum without central depression . . Damarciius, p. 169. 

 b" 1 . Thoracic fovea recurved. [p. 160. 



a n . Lateral eyes narrowly separated Scalidognatuus, 



b'\ Lateral eyes widely separated Nemesiellus, 



[p. 167. 



