382 ME. K. S. BAGNALL : CONTRIBUTION TOWARDS A 



of head ; three times as broad at base as at apex, and evenly narrowing from 

 base to tip. Terminal hairs not quite the length o£ tube ; those on the ninth 

 segment long and stout, being longer than the tube^ and the other abdominal 

 bristles rather short and weak. 



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

 (^Melnert^. 



Type. In the Copenhagen Museum. 



I. aiigustatus most closely approaches /. longiceps, Bagnall, and may be 

 separated by the colour, the shorter head, the absence of post-ocular spines, 

 the very short spine at each anterior prothoracic angle, the strongly 

 projecting fore-coxse, the fewer and decidedly less strong spines on the fore- 

 femora, the longer and even more slender body, and by the shorter and 

 stouter tube. 



Idolothrips LONGICEPS, Bagnall. 



Idolotki-ips lonc/iceps, Bagnall, Trans. Nat. Hist. Soc. of Northumberland, Durham, and 

 Newcastle-on-Tj-ne, n. s. iii. p. 211, pi. 7. fig. 10 (1908). 



Elaphrothrips longiceps, Buffa, * Redia/ v. fasc. 2, p. 164 (1909). 



Buffa records this species from Mexico, and there is a second specimen in 

 the Godman and Salvin collection from Chontales, Nicaragua. 



(Jenus LiOTHRiPS, Uzel. 



Liothrips elongatus, sp. nov. (PL 53. figs. 1-3.) 



? . Length 3*3 mm., breadth of mesothorax at base 0*5 mm. 



Colour black, tips of tibise and all tarsi brownish ; antennae with the third 

 joint clear yellow. 



Head with the anterior margin slightly rounded, narrowed anteriorly, 

 narrowest at base and widest across eyes ; twice as long as the prothorax and 

 slightly more than twice as long as wide at base. Cheeks straight, set with 

 a few minute and inconspicuous set*. Eyes large and rather finely facetted ; 

 space between them equal to the width of one of them ; post-ocular spines 

 long, longer than the length of eye. Ocelli large ; posterior pair set above 

 a line through centre of eyes and close to their margins, anterior one set on 

 the extreme vertex ; ante-ocular spines long (two-thirds the length of eye) 

 and stout. Antennae separated at base, inserted under the vertex and one 

 and one-half times the length of head ; first joint cylindrical, second elongate 

 and constricted at base, 3 to 5 claviform, and 6 to 8 fusiform ; relative 

 lengths of joints practically the same as in D. armatus. 



Prothorax not twice as wide at base (excluding the fore-coxse) as long, 

 widened from anterior margin for one-half the length, and from thence 

 parallel to base. Spines at posterior angles very long, inner posterior-marginal 

 pair short, and the mid-lateral and the anterior-marginal pairs apparently 



