KNOWLEDGE OF THE NEOTROPICAL THYSANOPTERA. 377 



Type. In the Copenhagen Museum. 



This species most closely resembles IK foveicoUis ; both sexes may be readily 

 recognized by the characters given in the table. 



DiCAiOTHRiPS PROPiNQUus, sp. nov. (PL 51. fig. 7 ; PI. 52. fig. 9.) 

 (^ . Length a little more than 9 mm., breadth of mesothorax 0'85 mm. 

 Colour dark chestnut-brown, all tibise and tarsi reddish yellow ; antennae 

 as in J?. Icevicollis . 



Head not quite three times as long as wide near base, narrowed behind eyes 

 and from thence parallel to base ; vertex slightly raised and produced beyond 

 eyes for one-seventh the total length of head. Cheeks set with several 

 moderately long spines, a few of which are slightly longer and more con- 

 spicuous than the others, and a lateral one behind each eye the longest and, 

 unlike the others, forwardly curved. Eyes bulging, moderately large and 

 finely facetted ; post-ocular spines absent. Ocelli rather large and the ante- 

 ocular spines very long. Antennae long and slender, inserted at extreme apex 

 of head and separated at base ; almost one and three-quarter times the length 

 of head ; joints 3 to 5 mildly claviform, G to 8 fusiform. Third joint 

 nearly four times the length of second, stalk comparatively stout ; fourth 

 five-eighths of third ; fifth four-fifths of fourth ; sixth three-quarters of fifth ; 

 apical joint almost as long as penultimate but more slender, and both together 

 slightly longer than the sixth. A pair of moderately long sense-cones on 

 segments 3 to 5, and apparently only a single one on the outer side of 

 segment 6, Mouth-cone rounded at tip and reaching halfway across pro- 

 sternum ; maxillary palpi moderately long, sensory filaments stout. 



Prothorax one-half the length of head, somewhat convex ; transverse channel 

 near hind margin wide and very shallow, almost obsolete ; surface smooth and 

 sh'ghrly shining ; fovea on each side of the median line obsolete. Spine at each 

 posterior angle long and stout : inner posterior-marginal pair short and weak, 

 and other prothoracic spines obsolete. Fore-coxa with one very long and 

 strong spine and several shorter ones : fore-femur strongly incrassate, broadest 

 through basal third, where it is a little less than one-half as broad as long ; 

 several short spines about the basal margin within, and a regular series for 

 the entire length of the inner margin ; many long ones on the outer edge, 

 one in the centre being longer than any of the others, a few shorter but 

 stronger ones near base without and numerous short ones for the entire length 

 of the outer edge, being much weaker apically than nearer the base of the 

 femur. Fore-tibia broad and depressed, hairs on the inner and outer edges 

 set in minute warts, and one long bristle below knee. Fore-tarsal tooth long 

 and stout, Pterothorax almost square, broader than the width across fore- 

 coxse. Hind and intermediate legs long and slender, femora with several 

 stout spines, a subapical series of longer ones and a very long one at the apical 



