380 MR. R. S. BAGNALL : CONTRIBUTIOX TOWARDS A 



outer edo-e ; £ore-tarsal tooth obsolete : £ore-coxa with one prominent spine. 

 Hind and intermediate femora with bristles as in D. prophiquus, but decidedly 

 weaker ; each intermediate tibia with two bristles, and hind tibia with one 

 bristle below the knee. Wings present, reaching to the fifth abdominal 

 segment ; iridescent ; median vein running almost to middle. 



Abdomen gradually narrowing to tube from the fifth segment ; ninth 

 segment apparenily possessing a pair of elongate dorsal fovese, which are, 

 however, indistinct and very difficult to make out. Tube stout, three-quarters 

 the length of the head, and about twice and one-half as long as broad at base. 

 Bristles at apex of the ninth segment longer than the tube ; other abdominal 

 bristles light-coloured, vvith one yery long pair on each of the segments 3 

 to 7. 



Type. In the Copenhagen Museum. 



Habitat. Tvvo iemales, Los Trinchera?, Venezuela, one on the 11th and the 

 other on the 12th of December, 1891, and one female, Caracas, Venezuela, 

 October 6th, 1891 (Meinert). 



From the shortly produced head it will be seen that this species is closely 

 allied to I), distinctus. The head is, however, much shorter, the eyes are 

 comparatively larger, whilst the tube, in proportion to the head, is longer. 



Genus Idolothrips, Haliday. 

 Elaphrothrips, Buffa, ' Iiedia,'v. fasc. 2, p. 162 (March 1st, 1909). 



I have already pointed out my reasons for regarding the species (/. margi- 

 tiata, Hal.) of Haliday^s first division of his genus Idolothrips as the generic 

 type, and at the same time erected the genus AeanthinotJirips for the species of 

 his second division, spectrum and lacertina. Despite these reasons, Prof. Buffa, 

 apparently following Froggatt in regarding Haliday's three species as one, 

 making Idolothrips spectrum the type of that genus, has erected for most of 

 the species that were previously referred to the genus Idolothrips, a new 

 genus, Elaphrothrips. As stated, Froggatt does not, in my opinion, give 

 sufficient data in support of his views, and in these circumstances we must 

 sink Buffa's genus Elaplirothrips as a synonym of Idolothrips, and retain the 

 genus Acanthinothrips, Bagnall, for Haliday's I. spectrum. To do otherwise 

 would, I consider, cause unnecessary confusion. 



Idolothrips angustatus, sp. nov. (PI. 51. fig. 11 ; PI. 52. fig. 11.) 



(^ . Length about 4*65 mm., breadth of mesothorax 0'55 mm. 



General colour brown ; tarsi yellowish brown ; antennal joints 3 and 

 ■1 yellow, shaded with brown at apices, and basal half of sixth joint also 

 yellow. 



