NO. 2008. NEW SPECIES OF THYSANOPTERA— MORGAN. 17 



RHIPIPHOROTHRIPS new genus. 



Body, especially the head and prothorax, deeply sculptured. 

 Head broader than long, uneven, somewhat narrowed behind, broadly 

 rounded in front and with a hump between the eyes. Eyes promi- 

 nent, slightly protruding. Ocelli present. Antennae eight-segmented; 

 second segment of the style much longer than the first and pro- 

 vided with a long slender hair at the tip ; third and fourth segments 

 each with a simple sense cone. Maxillary palpi two-segmented. 

 Prothorax shorter than the head, without spines at the angles. 

 Legs unarmed. Wings present; fore wings sculptured at the base, 

 narrow, with two longitudinal veins which are very indistinct. Spines 

 on veins very minute. Costa without fringe or spines. Anal spines 

 weak. Mesothorax produced into prominent acute angles in front. 

 Male with a curious fan-shaped scale on each lateral margin of the 

 ninth segment, near the tip. 



This genus is very near Heliothrips, but differs from it in being 

 sculptured instead of reticulated, and in the fan-shaped scale on the 

 ninth abdominal segment of the male. 



Type of the genus. — RMpipliorothrips pulchellus, new species. 



RmPIPHOROTHRIPS PULCHELLUS, new species. 



Figs. 33-37. 



Male. — Length 1.97 mm.; width of mesothorax 0.3 mm., greatest 

 body width a little less than width of mesothorax. General color 

 yellow, with heavy tinge of dark brown on head and thorax. 



Head dorsally only about three-fifths as long as wide, ventrally 

 about four-fifths as long as wide; deeply and coarsely sculptured; 

 broadly rounded in front of eyes; a hump between the eyes which 

 bears the ocelli; cheeks very rough, produced laterally behind the eyes; 

 outline of the eyes more convex than outline of head at that point, 

 so that there is a distinct notch both before and behind the eyes. 

 Eyes prominent, slightly protruding, rather coarsely facetted, not 

 pilose, black by transmitted light, yellowish brown by reflected light. 

 Back of head slightly narrowed. Ocelli about as large as facets of 

 eyes and situated upon sides of hump between the eyes ; approximate, 

 pale yellow, the anterior ocellus being directed forward; inner cres- 

 cents indistinct yellowish orange. Mouth cone not quite reaching 

 across prosternum, black at the tip; labrum rather sharply pointed; 

 labium rounded at tip; maxillary palpi short, the first segment 

 shorter than the second; labial palpi short and blunt. Antennae 

 situated very low, just above ventral margin of the head, well 

 separated, each in a depression next the eye and below the produced 

 front ; relative lengths of segments as follows : 



J_ ^ _3_ _±_ _5_ _6_ 2. _i_ 

 9.5 12 18.7 15.5 12.5 U 2.8 15.3 

 95278°— Proc.N.M.vol.46— 13 2 



