178 



Records of the Indian Museum. 



[Vol. XIII, 



Trichosiphum dubium, sp. nov. 



Apterous viviparous female. 



Measurements. 



Length of body 

 Breadth of bod}'' 

 Length of antennae 

 Length of siphunculi 



2*88 mm. 

 I"62 ,, 

 1-26 ,, 

 076 ,, 



Colour. — Body dirty 3'ellowish. Eyes red. Antennae light 

 yellow, with blackish apex. Legs light yellowish- brown. Siphun- 

 culi dark brown. Cauda light brownish. (Notes from specimen in 

 alcohol). 



Morphological characters. — Body broad ovate ; the whole dor- 

 sum covered with numerous strong, moderately long spines, which 

 are always simple at the apex. 



F"iG. 2. — Ti'icliosipliuiii diibiuni, sp. nov. 

 Hind part of abdomen of apterous female (dorsal view). 



60. 



Antennae less than half as long as the body, with a few long 

 spines, relative lengths of the five last joints about as: 29. 9. 13. 

 II. 24. Primary sensoriae without hair-rim. 



Rostrum long, reaching to the third pair of coxae. 



Siphunculi moderately short, thick, distinctly broadest to- 

 wards the middle, with many fairly long bristles ; the integument 

 covered with numerous " spinule-rows." Cauda obsolete; the last 

 abdominal segment broadly rounded, not prolonged into a dis- 

 tinct small point. Rudimentary gonapophyses very close together, 

 with a few short hairs ; their number not distinct, apparently 3. 



Legs slender, with some long hairs. (Described from 4 ap- 

 terous females, together with numerous larvae and a few nymphs). 



Food-plant unknown. 



Locality. — Birch Hill (Darjiling district), 6,000—7,000 feet, 

 30-vi-i9i4 (Carmichael coll.). 



Types in the collection of the Indian Museum, Calcutta 

 No, 5590/h- I. 



