506 MK. R. S. BAGNALL ON A COLLECTION OF 



yellowish. Head and antennse rather darker, with 2nd joint faintly lighter. 

 Fore-£einur yellowish, all tibise yellow, lightly tinged with grey. AVings 

 light grey-brown, lightest basally. 



Head very narrow, about 1*6 times as long as broad and only 0'75 the 

 total length of the prothorax ; produced beyond eyes. Eyes long, occupying 

 about 0"55 the length of the head, and somewhat close together at their inner 

 margins near middle. Ocelli large, especially the posterior pair, which are 

 widely separated and situated close to the anterior margins of the eyes ; 

 £ore-ocellus placed near insertion of antennfe. Cheeks practically parallel, 

 short, occupying only 0'27 the length of the head ; produced part about 0'7 

 the width across eyes, the whole of the front being occupied by the insertion 

 of the antennse. Antenuse almost touching at base, about twice as long as 

 the head ; joints 3 and 4 broader than long ; relative lengths of joints 

 approximately 10 : 13 : 11 : 10 : 11 : 12 : 12 : 13, formed as in PL 48. fig. 6. 

 Sense-cones on segments 3 to 6, short and rather stout, only 1 on 6. Mouth- 

 cone short and rounded, reaching only about one-third way across prosternum ; 

 maxillary palpi short, with one of the sensory filaments at apex longer than 

 the palpus. 



Prothorax apparently not strongly chitinous, almost as long as broad, 

 broadest at posterior third, where it is about 2 5 times as broad as the head ; 

 narrowed evenly from anterior third to juncture with the head. Only one 

 pair of noticeable bristles at a position indicative of the posterior angles. 

 Prosternum with a long median impression or line. Pterothorax about 

 1'75 times as long as broad. Posterior coxse closer together than the other 

 pairs. Fore-femur rather long and broad, intermediate and hind femora 

 and all tibise short and stout ; fore-tarsus with a stout tooth. Wings reaching 

 to about the 7th abdominal segment, both pairs curiously narrow and 

 parallel-sided ; fore-wing about twenty times as long as broad near middle ; 

 hind pair with a median vein running well down towards apex. Cilia long, 

 rather widely spaced, with 4 duplicated near apex of posterior margin in 

 the fore-wing. 



Abdomen long and linear, about 0*6 the total length of the insect, and five 

 times as long as broad across the 8th segment. Eighth segment produced 

 at each hind angle of the sternite in the form of a long sharp spine, inwardly 

 directed and curved and reaching to the base of the tube ; posterior margin 

 of sternite armed with 4 shorter pairs in addition to the lateral teeth, the 

 innermost pair being the longest and stoutest. Posterior margin of 8th tergite 

 simple. Tube short and stout, about 0*8 the length of the head and about 0'6 

 as broad at base as long ; apical hairs not as long as tube, very weak distally. 



Type. In the Hope Collections, University Museum, Oxford. 



Habitat. Trinidad, Arima, Verdant Vale. Taken on a window, to which 

 they were blown by strong wind. 



