ro.l335. WALKINGSTICKS OF THE UNITED STATES— CAUDELL. 879 



to the thorax. AntenriiB multiarticulate," more than twice as long as 

 ithe anterior femora. Cruciform impression on the pronotum disrtinct, 

 meso- and metathorax subequal in length and furnished above with a 

 scarcely perceptible delicate median carina. Ninth abdominal segment 

 slightly longer than the seventh. Legs stout, anterior ones unarmed 

 and but half as thick as the others; posterior and middle tibi?e deeply 

 denticulate below on the median carina, which is considerably elevated 

 and terminated at the apex in a blunt spine, as is also the posterior 

 ventro-lateral carinse. The posterior and intermediate femora are 

 laro-e and regularlv trapezoidal in form, each border below denticulate 

 and spined on the median line with small apinules, except the terminal 

 one, which is very large in the male. In the female all the spines are 

 often large, but not so large as the terminal one of the male; the 

 femora are broadest on the lower side and slightly swollen toward the 

 base. The male femora are somewhat more rounded than those of 

 the female. Posterior femora extending to the apex of the third 

 abdominal segment in the female and almost to the middle of the 

 fourth in the male; margins above coxal cavities slightly expanded 

 and dentate. Cerci stout, in female less than one-half as long as the 

 last abdominal segment; in male expanded apically, somewhat spat- 

 ulate and directed strongly downward. 



The original description, which was made from the female sex 

 alone, gives the following measurements: Length of body 123 mm.; 

 thorax 53 mm. ; mesothorax 24 liim. ; metathorax 24 mm. ; abdomen 70 

 mm. ; fore femora 27 unu. ; middle femora 20 mm. ; posterior femora 

 23 mm. ; width of middle of mesothorax 5 mm. 



Often the general color is reddish brown, legs lighter. A specimen 

 in the U. S. National Museum collection has the middle and hind 

 femora and the posterior two-thirds of the prothorax green, varie- 

 gated with light gray and brown; on the femora the gray is grouped 

 together in the form of liroad, illy defined bands. Other specimens 

 have the anterior portion of the prothorax and mesothorax, both above 

 and below, greenish black. 



This insect has been recorded from Louisiana, Texas, New Mexico, 

 and, with doubt, from Alabama. One female specimen in the U. S. 

 National Museum is from East Joplin, Missouri, the most northern 

 locality yet recorded for this species. 



This is the largest walkingstick that occurs in the United States, a 

 female before me measuring 145 mm., which is 5 mm. less than one 

 in the collection of the Academy of Natural Sciences of Philadelphia. 

 This species suggests tropical forms- more than anything eL^e m our 



«Theantennal segments of a male speoimen from Texas were counted and were 

 found to number just seventy-eight. The antenn* of the specimen figured is drawn 

 nearly twice too thick, except basally. 



