136 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Life history unknown oxeopt that they hil^ernato in dried flower 

 stiMus and in turf. 



I haye compared niy ypecimens with those of Osborn's C. anteimatus 

 and they are identical. 



CHIROTHRIPS CRASSUS, new species. 



Plate II, figs. 17-20. 



jremale. — Leng-th O.TS mm. ; width of mesothorax 0.26 mm. Gen- 

 eral color of head and thorax l>rowu; abdomen graj^-brown or yellow- 

 ish brown. 



Head yery small, slightly wider than long-, narrow^ed in front 

 between the eyes and elongated anteriorily; distance between eyes 

 equal to one-half the width of head; frons between antenna bluntly 

 acuminate. Eyes reddish orange by reflected light; ocelli placed in a 

 low triangle far back between hind edge of eyes; each ocellus pale, 

 margined inwardly with a dark-red crescent. Mouth cone yery short 

 and l)roa'dly rounded; maxillary palpi short, three segmented. Anten- 

 na' approximate at liase; relative lengths of segments as follows: 



i.5 6 T 6.5 6 8.3 2.8 3 



Basal segments large, longitudinally compressed, nearl}^ twice as 

 wid(^ as long; segment two drawn out at outer angle into an acute 

 process; three with slender peduncle, subpyriform, l)earing one promi- 

 nent sense cone on outside, as does also four; four and fiye rounded; 

 four nearly as thick as long; fiye somewhat narrower; six elongated; 

 seyen and eight moderately slender. One and two pale straw yellow; 

 three to six shading gradually to a medium brown; seven and eight 

 also medium lirown. 



Prothorax one and one-half times as long as head, one and three- 

 fourths times as wide as long, twice as wide at posterior edge as at 

 anterior; sides nearly straight, indented above fore coxjb, with prom- 

 inent spines at posterior angles. Mesothorax one and one-fourth times 

 as wide as prothorax, quite a deep constriction between mesothorax and 

 metathorax; pterothorax with more or less rusty tinge. Wings long, 

 saber-formed, slightly overreaching the tip of the alxlomen; fore wings 

 shaded with gray, hind wings nearly clear. Fore longitudinal vein 

 extends through the wing; hind vein arises from fore vein at one-third 

 its length; both veins disappear before reaching the tip of the wing. 

 Foi-e vein bears two spines on distal half; hind vein bears Ave spines. 

 Legs short; fore pair strongly thickened; all femora grayish or yel- 

 lowish brown; fore tibiae and all tarsi pale yellowish; middle and hind 

 til)ia> ]>rownish at bases and above, fading to pale gray or yellow 

 beneath and at extremities. 



