378 MR. R. S. BAGNALL : CONTRIBUTION TOWARDS A 



third without ; tibiae furnished from knee to tip with rows of moderately long- 

 white hairs, and a single long bristle below each knee. 



Abdomen more than three-quarters the length of the whole insect, all 

 segments elongate and gradually tapering from the base to tube. Eighth 

 segment three times as long as broad, and ninth about one-third the length of 

 eighth. Dorsal surface sparsely furnished with minute white setse. Tube 

 gently narrowed from base to near apex ; not quite live times as long as broad 

 at base, and only very slightly broader at base than at extreme apex ; not 

 quite two and one-half times the length of the preceding segment and about 

 two-thirds the length of the head. Terminal hairs rather long and tapering, 

 three-quarters the length of tube. Bristles on the ninth segment stronger 

 and about as long as tube ; other abdominal bristles colourless and moderately 

 strong. 



Habitat. One male, Los Trincheras, Venezuela, December 11th, 1891 

 (Ileinert). 



Type. In the Copenhagen Museum. 



D. propinguus is distinct on account of the very long eighth abdominal 

 segment and the comparatively short tube. 



DiCAiOTHRiPS DiSTiNCTUS, sp. nov. (PI. 51. fig. 8 ; PI. 52. fig. 10.) 



Length G'O mm., l)readth of mesothorax 0"7 mm. 



Colour black, intermediate and hind-tibias dark chestnut-brown ; tarsi 

 yellowish to brown, fore-tibia3 and tarsi reddish yellow, with inner and outer 

 margins of tibia shaded with dark brown. 



Head two and three-quarters as long as wide near base and a little more 

 than twice the length of prothorax; almost imperceptibly narrowed behind 

 eyes and from thence, with the exception of a slight constriction near base, 

 parallel-sided ; vertex raised and just overreaching the insertion of antennae, 

 produced beyond eyes for only about one-tenth of the total length of head. 

 Cheeks sparsely set with short spines. Eyes moderately large and finely 

 facetted and not bulging strongly, occupying laterally about one-quarter the 

 total length ; post-ocular bristles absent. Ocelli moderately large, placed as 

 in Icevicollis, but having the anterior one nearer to the posterior pair, the space 

 between the latter being about three times the diameter of the ocellus. 

 Ante-ocular bristles very long. Antennae inserted just below vertex, basal 

 joints separated ; second joint longer than the first, brown ; rest of antennae 

 unfortunately broken in the single specimen. 



Prothorax one and one-half times as wdde through middle as long ; anterior 

 margin emarginate, sides rounded ; bristles at each posterior angle moderately 

 long and prominent ; roundly raised to posterior third^ with the disc flat and 

 a distinct and somewhat deep fovea on each side of the mid-line on a line 

 drawn through the posterior third. Anterior femur twice as long as broad, 



