204 REPOET OF STATE GEOLOGIST. 



Sub-family BACUNCULIN^. 



This sub-family comprises the longest and most slender of the 

 United States walking-sticks. The mesothorax is usually live or 

 more times as long as the prothorax. The antennae, except in the 

 genus Sermyh, are more than twice as long as the front femora. 

 The tibi.i? are without a sunken areola beneath the apex. 



Four of the United States genera belong to this sub-family. Of 

 these, two are represented only in the Gulf and adjoining states; 

 and a third only in the Rocky Mountain Eegion and California. 

 The species of the other genus, Diaplieromera, are widely distributed. 

 Amono- them bolono's our most common Indiana "walkinij-stick." 



X. DiAPHEROMERA Gray (1835). 



Body long, slender and cylindrical. Head smooth, longer than 

 broad; obliquely attached to the thorax; the eyes small. Antenna? 

 inserted in front of the eyes, more than twice as long as fore femora, 

 furnished with 30 or more segments. Pronotum about the length of 

 head. Mesonotum longer than any other segment; metanotura three- 

 fourths the length of the mesonotum. Median segment much shorter 

 than metanotum, transverse, quadrate. Legs very long and slender, 

 the femora of the middle pair in the male of our species much swol- 

 len; armed, like those of hind pair, on under side near the apex with 

 an acute spine, most prominent in the male. Cerci of the male long, 

 terete and incurved; those of the female short, straight. 



Five species occur in the United States, of which the most common 

 and widespread is 



15. DiAPHEROMERA FEMORATA (Say). The Thick-thighed Walking-stick. 



Spectrum, fniumitum Say, 138, H, 1824, 297; Id., 137, IH, 1828, Plate 

 27; Id., 139, 1859, I, 82, 197, Plate 37; Emm., 49, V, 1854, 

 142, Plate 7, Figs. 1, 2; Rathv., 109, lSfi2, 377, Fig. 11. 



Diaphn-omcm femorata Harr., 7 1, 1841, 119; Id., 72, 1862, 146, Fig. 

 67; Pack., 104, 1869, 573, Fig. 566; Glov., 62, 1872, Plate I, 

 Fig. 7; Plate X, Fig. 1; Id., 63, 1874, 184, Fig. 6; Scudd., 

 14 8, I, 1874, 379, Plato A, Fig. 3; Id., 17 2, XXVU, 1895, 80; 

 Id., 169, LXXXVni, 1894, 456, 460; Id., 17 8, Yin, 1897, 30: 

 Id., 188, 1900, 14; Id., 19 1, IX, 1901, 187; Riley, 120, 1878, 

 241, Plate 3, Figs, a-c; Id., 12 2, II, 1884, 176, Fig. 253; Comst., 

 4 1, 1888, 95, Fig. 91; Id., 42, 1895, 108, Fig. 118; Feru., 53, 

 1888, 49, Fig. 19; Beut., 3, VI, 1894, 262, Plate 10, Fig. 10; 

 Weed., 222, 1897, 6, Plate 5; Lugg., 84, 1898, 100, Fig. 61; 

 Bl., 16, 1899, 208, Fig. 45; How., 76, 1901, 328, Fig. 214; 

 Caud., 40", 1908, 874, Figs. 4, 6. 



