NEW GENERA AND SPECIES OF THYSANOPTERA 213 



abdominal segment only reaching to the middle of tube ; 

 abdominal spines also short and weak. 



Type — One male in coll. Godman and Salvin. 



Hab.— Orizaba (H.S. and F.D.G., Dec, 1857). 



Idolothrlps assimilis sp. n. (PI. VII., fig. n). 



Length 4 mm. ; breadth of mesothorax o*6 mm. 



Very closely resembling /. longiceps, but decidedly broader 

 and differing in the following respects. 



Head only about two and one-half times as long as 

 wide, without spines protecting anterior ocellus, nor the 

 conspicuous lateral spine behind each eye ; spines generally 

 not so strong, with the exception of the post-ocular one, which 

 is extremely long. 



Prothorax with short mid-lateral spines, those at fore- 

 angles weaker and not set on small warts ; those at posterior 

 angles much longer ; posterior-marginal spines also com- 

 paratively long. Spines on legs not so stout, but all sparingly 

 armed with some very long bristles ; fore-tibia not produced 

 to a tooth at apex within ; the tarsal tooth only small. Wings 

 longer, reaching to the ninth abdominal segment. 



Abdomen (curled in the type specimen) apparently much 

 broader, elongate-ovate, broadening from base to fourth 

 segment, and then gradually narrowing to tube. Tube broader 

 and gradually narrowing to the apex from base. Terminal 

 hairs slightly longer ; abdominal bristles decidedly longer and 

 more slender. 



Type — One male in coll. Godman and Salvin. 



Hab. — Chontales, Nicaragua {J^ansen). 



Idolothrlps affinis sp. n. 



Length 4*8 mm. ; breadth of mesothorax 0*73 mm. 



Closely allied to /. assimilis, larger, and differing chiefly 

 in the absence or abbreviation of the post-ocular and pro- 

 thoracic spines, and in the legs which are set with fewer 

 spines. 



