206 



AK.ACHNOMOBPH.E. 



207. Ornithoctonus andersoni, Pocock, Jour. Linn. Soc, Zool. xxiv, 

 p. 317, pi. xxii, figs. 1-3, 1892. 

 o Colour : a nearly uniform reddish brown, darker beneath 

 and on femora, some white hairs at the extremities of the leg- 

 segments. Carapace as long as the patella and tibia and one- 

 fourth of the protarsus of the 1st or 4th legs, considerably 

 exceeding protarsus and tarsus of 4th. Legs somewhat thickly 

 hairy, 1st and 4th subequal and considerably less than two and a 

 half times the length of the carapace; patella and tibia of 4th leg 



a little less than of 1st. . 



Measurements in ^m.-Total length 52, carapace 25 1st leg 

 61 2nd and 3rd 54, 4th 62, patella + tibia of 4th 12, of 1st 23. 



Loc. Tenasserim : Mergui (Anderson). 



Suborder ARACHNOMORPHJE. 



Differing from the Mygalomorpha? in having the basal segment of 

 the mandible articulated in a horizontal plane to the under side of 

 the head and directed downwards, the fang closing obliquely 

 inwards (tig 52, p. 155). The posterior respiratory organs are in 

 the form of tracheal tubes, which in most cases open by a common 

 anerture hist in front of the spinners. S^nmng-mamilla mormally 

 six in number, often accompanied by the cribellum or the colulus. 

 Coxa of palp furnished with a large maxillary process. Sternum 

 without distinct sieilla (at least in the Indian genera). 

 Distribution. Subarctic, temperate, and tropical countries 

 With the exception of one or two forms of doubtlu systematic 

 nosition or great scarcity, the Indian species of Arachnomorphaj 

 maVbe refeLd to the following families (those that are printed 

 in italics have been omitted from the present volume) :- 



Synopsis of tlie principal Indian Families. 



a. Cribellum and calamistrum present 



a\ Head-region large, rounded, high; posterior 



lateral eyes remote from the rest ••••••• ^resids. 



&i Head low, narrowed, not strongly rounded; pos- 

 terior lateral eyes very rarely remote from the 



others 

 a\ Tarsi furnished with ungual tufts and an in- psechridae 



ferior claw 



h 2 Tarsi without ungual tufts. _ 



a» Anal papilla long and conically acuminate . Uloboridce. 



b 3 '. Anal papilla short, semicircular Dictynidce. 



b Cribellum and calamistrum absent. 

 ' aK Sternum much wider than long ; the posterior 



coxa? widely separated .- riatonaae. 



b\ Sternum net wider than long ; posterior coxse 



not widely separated. 

 o 5 Posterior spinners absent or much shorter than 



the anterior Zodarndce. 



