GENEEA OF THYSANOPTERA FROM VENEZUELA. 333 



Actinothri'ps somewhat closely resembles Anactlnotlirips, but may be easily 

 separated by the relatively longer antennas and tube ; the form of head and 

 abdomen ; the spine on the first antennal joint ; the ocelli which are not 

 equidistant ; the absence o£ the long, dorsal, cephalic bristles and o£ the ante- 

 ocular spines, and by the possession o£ metascutular tubercles. In Aciinothrijys 

 the wings are more slender, and each has a strong median vein reaching 

 almost to tip, whilst in AnactinotKrips the wing is much broader and the 

 median vein is obsolete. This vein, and the absence of it, suggest the generic 

 names Actinotkrips and Anactinothrips respectively. 



ACTINOTHRIPS LONGICOENIS, Sp. nov. (PL 46. figS. 8-12.) 



? . Length 7'5 mm., breadth of mesothorax 0'8 mm. 



General colour dark chestnut-brown, tibise and tarsi lighter ; wings testa- 

 ceous with median veins dark brown and cilia shaded with brown ; antennae 

 with second joint reddish brown, joints three to five yellow tipped with brown, 

 and sixth joint yellowish at base. 



Head about twice as long as wide through eyes, and very slightly more 

 than twice the length of the prothorax ; vertex slightly produced beyond 

 eyes. Head gently narrowed behind eyes, as gently widened to basal third 

 and constricted at base ; cheeks with a few hairs ; a very strong pair of lateral 

 spines immediately behind eyes and a similar pair at basal third. Eyes 

 moderately large, bulging and finely faceted, occupying laterally about one- 

 quarter the length of the head ; postocular spines short and only moderately 

 stout, placed shortly behind eyes ; anteocular spines obsolete. Ocelli large, 

 not equidistant ; posterior pair close to the inner margins of eyes and above 

 a line drawn through their anterior third, anterior one unprotected, placed 

 at the extreme vertex. Mouth-cone reaching more than halfway across 

 prosternum, maxillary palpus stout, having the apical joint about three times 

 the length of the basal ; touch-bristles short and stout. Antennae very long and 

 slender, at least three times the length of the head ; sub-approximate ; basal 

 joint stout, longer than broad, cylindrical, and dorsally armed with a rather 

 long and stout spine near apex ; second joint narrower than first ; third to 

 sixth very mildly claviform ; seventh fusiform, and eighth most probably 

 fusiform, but unfortunately broken in the solitary specimen. Third joint 

 seven times the length of second ; fourth about five-eighths of third ; fifth 

 five-sixths of fourth ; sixth three-fifths of fifth, and seventh one-half as long 

 as the preceding. Sense-cones very long, slender and acute ; three on 

 third joint, five or more on fourth, three or more on the fifth, and two on 

 the sixth. 



Prothorax transverse, only a little more than one-half as long as broad, a 

 long spine at each posterior angle set in a tubercle, and a similar pair of spine- 



