TO. 132.5. WALKINGSTICKS OF THE UNITED STATES— CAUDELL. 875 



attached to the thorax; eyes round, slightly more prominent in the 

 male than in the female. Antenna long- and slender, about as long- as 

 'the body; prothorax short, about oiie-tifth as long as the mesothorax, 

 the dorsal cruciform impression distinct, especially the transverse inci- 

 sion; meso- and metathorax subequal in length, without median carina. 

 Leo's of male long and slender, except the middle femora, which are 

 much swollen and distinctly thicker than the others; of the female, 

 shorter in proportion, and the middle femora are not swollen, no 

 thicker than the others. Fore legs unarmed, undulate and .smaller at 

 the base; hind and middle femora of the male armed beneath on the 

 median line near the apex with a large, prominent spine; of female, 

 similarly armed, but the spine is much smaller, often quite minute. 

 Abdomen smooth; intermediary segment visible only from above and 

 firmly united to the metathorax; basal segment elongate, nearly or 

 quite twice as long as broad in the female and three times as long as 

 broad in the male; seventh segment in the male distinctly longer than 

 the ninth and three times as long as the eighth. Cerci of male some- 

 what longer than the terminal segment of the abdomen, cylindrical, 

 oval at apex, bluntly tubercled interiorly at base, clothed with micro- 

 scopic stiff hairs and strongly curved horizontally inwards, usually 

 crossing each other at about the middle; female cerci straight, stout, 

 acuminate, less than half as long as the terminal segment of the abdo- 

 men, and partially concealed from above by the exposed tip of the 

 triangular supraanal plate, which, as well as the cerci, is sparsely cov- 

 ered with very short hairs of microscopic size. 



Length of body, male, 72 mm., female, 70 mm.; me.sothorax, male, 

 17 mm., female, 16 mm.; metathorax, male, 16 mm., female, 13.5 

 mm.; middle femora, male, 15.5 mm., female, 11.5 mm.; hind femora, 

 male, 19.5 mm., female, 15 mm.; hind tibia, male, 25 mm., female, 



16 mm. 



The above description was drawn up from a male and female col- 

 lected in copulation at Rosslyn, Virginia, on September 12, 1900. 

 The males are quite uniform in size, but the females are quite variable, 

 the one from which the above measurements were taken being a small 

 specimen. A large female from Massachusetts before me gives the 

 following measurements: Length of body, 92 mm.; mesothorax, 19 

 mm.; metathorax, 17 mm.; middle femora, 14.5 mm.; hind femora, 

 18.5 nmi.; hind tibia, 20 mm. 



This species is our most common phasmid and occurs throughout 

 the northern part of the country from the Rocky Mountains eastward. 

 It is said to also occur as far south as Mexico, but is more rare in the 

 South, being quite generally replaced there by the next species, veliez. 

 Many of the southern records pertain to allied species mistaken tor 



femorata. . • fu f 



These insects mate in the autumn and pairs are often seen m the act 



