374 Mil. K. S. BAGNALL : CONTRIBUTION TOWARDS A 



slender, evidently considerably longer than the head, but unfortunately broken 

 in the type-specimen, only five joints remaining intact. First and second 

 joints short and cylindrical, black ; third, fourth, and fifth joints yellowish 

 brown, and shining black at tips. Third more than three times the length o£ 

 the two basal joints together ; fourth one-half the length of third, and 

 fifth four-fifths the length of fourth. Sense-cones moderately long and 

 acute. 



Prothorax one-third the length of the head, and about one-third broader 

 than long; irregularly foveolate, with distinct humeral depressions, a deep, 

 transverse depression before base, and with somewhat shallow and irregular 

 fovese at each side of central channel. A spine-set tubercle at each posterior 

 angle, a pair of short posterior-marginal spines, and minute spines at each 

 anterior angle. Each fore-coxa set with one long, conspicuous spine and 

 several shorter ones. Fore-femora much enlarged, with dorsal surface de- 

 pressed ; inner margin armed with a series of moderately long and strong- 

 bristles, and the outer margin with several much longer bristles interspersed 

 with short ones. Fore-tibia short and broad, and fore-tarsus armed with a 

 long, strong tooth. Intermediate and hind tibise slender, and the hind pair 

 exceptionally long. Wings reaching to fifth abdominal segment, cilia closely 

 set but not heavy. 



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

 long and slender, canaliculate, exceedingly sparsely clothed with minute white 

 setse. Segments 5 to 8 each between four and five times as long as 

 broad ; ninth segment short, only one-fifth the length of the preceding. 

 Tube narrow, four times the length of ninth segment, but not quite so long as 

 the head. Terminal hairs short and weak, not one-half the length of the tube. 

 Bristles at apex of the ninth segment and at the basal third (or thereabouts) 

 of the preceding segments moderately long, but weak. 

 Habitat. Cerro Zunil, 4000-5000 feet {Champion). 

 Type. In coll. Godman and Salvin, one ,^ . 



Dicaiothrips grandis may be separated from D.foveicollis (Bagnall) by its 

 much larger size, the longer head as compared to its breadth, the very long- 

 lateral cephalic bristles, the less glossy surface of head and fore-femora, the 

 much elongated eighth abdominal segment, and by the shorter and less strong 

 bristles on the ninth abdominal segment. In foveicollis, moreover, the third 

 antennal joint is less than twice the length of the fourth. These comparative 

 remarks also apply, for the most part, to D. Cliampioni and D. IcevicoUis, 

 whilst the species is directly separated from propinquus in the table. 



D. grandis is the largest known species of Dicaiothrips and a giant of the 

 order. 



