DESCKIPTIONS OF NEW GENEKA AND SPECIES. 37 



9. Genus ECHINOTHRIPS new genus. 



Head and thorax with a deeply reticulated structure (sides of abdo- 

 men may also be reticulated). Head about as long as wide and not 

 longer than the prothorax. Eyes large, oval, prominent. Ocelli 

 present. Antenna? with eight segments, long, slender, last four seg- 

 ments united evenly and diminisliing in size gradually. Prothorax 

 angular at sides. Legs slender, unarmed. Wings present, strong, 

 broadest at base and tapering gradually to a pointed tip, without 

 prominent veins except fore part of ring vein. Spines on fore margin 

 and where fore longitudinal vein should be, long, strong, and with 

 blunt tips. 



This genus has many of the characters of both IleliotJirips and Dic- 

 tothrips. It is readily determined from the former by the shape of 

 the antennae, inasmuch as the segments are all rather slender and ciuits 

 evenly united; segment 6 is longest; the style not longer than seg- 

 ment 6. It is readily separated from Dictotlirips by the character of 

 the wings, wliich have two rows of long, strong, blunt spines along the 

 anterior margin. 

 (22) Echinothrips mexicanus new species. (PL III, figs. 16-19.) 



Measurements: Head, length 0.10 mm., width 0.15 mm.; protho- 

 rax, length 0.10 mm., width 0.18 mm.; mesothorax, width 0.23 mm.; 

 abdomen, width 0.23 mm.; total body, length 0.92 mm. Antennae: 

 1, 9 (x; 2, 30 /<; 3, 45 [i; 4, 39 //; 5, 45 //.; 6, 60 jx; 7, 15 //; 8, 27 jx; 

 total, 0.27 mm. 



General color uniform dark brown, with red pigmentation. Bases 

 of femora, tips of tibiae, all tarsi, outer half of segments 3 and 4, and 

 base of segment 5 of antennae yellow. 



Head noticeably wider than long, retracted into the prothorax, 

 angular in front, with basal joints of antennae subapproximate; ver- 

 tex depressed and bearing the anterior ocellus on its anterior surface; 

 strongly reticulate; cheeks roughened and with spines. Eyes large, 

 oval, prominent, slightly protruding, reddish black with yellowish 

 inner and outer margins; facets large, protruding, strongly pilose. 

 Ocelli present, subapproximate, placed near center of head, anterior 

 ocellus directed forward, posterior ones distinctly separated from 

 inner margins of eyes; yeUow-orange, with deep orange-red crescents. 

 Mouth-cone pointed, reaching past base of prosternum. Antennx 

 vAi\\ eight segments, two and one-half times as long as head, slender; 

 segment 6 longest; segments 1 and 2 deep brown, unicolorous mth 

 head, terminal segments brown, intermediate segments yellow. 

 (Segments 5 to 8 united evenly, antennae tapering gradually from 

 base of segment 6 to tip.) 



Prothorax about as long as head, widest at middle; sides angular, 

 roughened and with curved spines; strongly reticulate. Mesothorax 



