1913] Hood — A Collection of Thysanoptera from Panama l L 2/5 



having a dark median vitta in the basal half of the fore wings, 

 Thirteen specimens were taken at Miraflores in January, in 

 "sweepings along a stream and in small clearings." 



Polyommatothrips vigilans sp. nov. 

 (Figs. 3, 4.) 



Female: Length about 3.0 mm. Color blackish brown, with abundant maroon 

 hypodermal pigmentation; abdominal segments 3-8 at base with a pair of small 

 latero-dorsal white blotches (as in Acanthothrips nodicornis Reuter); fore tarsi, 

 ends of fore tibiae, and apex of fore femora yellow; antenna 4 largely yellow; tube 

 paler in apical half. 



Head twice as long as wide, broadest midway between eyes and base, compressed 

 and subcarinate above; dorsal and lateral surfaces finely subreticulate, sparsely 

 and briefly spinose, without prominent tubercles; cheeks gently arcuate, with short 

 collar-like thickening at base; postocular brislles short, only one third as long as 

 eyes, slightly dilated at tip. Eyes very finely and closely faceted, somewhat pro- 

 truding, less than one third as long as head, extending inward nearly to the median 

 line and almost completely surrounding the ocelli. Ocelli anterior, equidistant, 

 subapproximate. Antennae 1.6 times as long as head, very slender; segments 3-6 

 clavate, abruptly narrowed apically, urn- or vase-shaped (as in Acanthothrips); 

 7 fusiform-truncate, closely united to 8, which is conical; segments 1 and 2 pale 

 brownish yellow; 3 yellow, clouded apically, nearly black at apical constriction; 

 4 yellow, nearly black at extreme base and apex, clouded in apical third ;5 and 6 

 yellow, black at extreme base, washed with blackish brown in apical half and two 

 thirds, respectively; 7 and 8 blackish brown; sense cones long, slender, broad at 

 base, those on segment 3 less than one third the length of segment; formula: 3, 

 1-2; 4, l-2 +1 ; 5, 1-1; 6, 1-1; 7 with one on dorsum near apex. Mouth cone and 

 palpi very long, acute, nearly attaining metasternum. 



Prothorax deeply emarginate in front, its median dorsal length about two thirds 

 the lateral length, the latter half that of head and half the width across fore coxae; 

 all usual bristles present, short, slightly dilated at tip. Pterothorax slightly wider 

 than long, broader than prothorax; sides nearly straight, slightly converging pos- 

 teriorly. Wings long, closely fringed, not narrowed at middle; fore wings about 

 one and one half times as wide at basal fifth as at middle; scale and the region 

 of the three subbasal spines dark brown; a dark bar occupies the anal half of the 

 second fourth of the fore wings, darkest toward the median line, along which it is 

 continued nearly to apex of wing; costal half of second fourth of fore wings darkened 

 with brown; subapical fringe on posterior margin of fore wings double for about 32 

 hairs; hind wings brown at base and with prominent dark median vitta reaching 

 nearly to apex. Legs long and slender; fore femora swollen; fore tarsi unarmed. 



Abdomen slender, seemingly narrower than pterothorax. Tube less than half 

 as long as head and more than half as wide at apex as at base, <>p;iqu<' black in basal 

 half, brown in apical half. Marginal abdominal bristles (excepting those on seg- 

 ment 9, which are pointed and fully twice as long as tube) moderatelj short, blunt; 

 terminal bristles lacking in the type. 



