124 



Measurements: Male— Length of body, 13.5 mm.; of tegmina, 9 mm.; 

 of hind femora, 13 mm.; of pronotum, 3.5 mm. Female— Length of body, 

 14.5 mm.; of tegmina, 8.5 mm.; of hind femora, 14 mm.; of ovipositor, 

 15 mm. 



Although found in Indiana wherever collections have been made, this 

 species appears to be less common than either fasciatum or brevipenne. It 

 differs from them also in the manner of oviposition, as, instead of depositing 

 its eggs in the stems of grasses, it seeks the turnip-shaped galls so common 

 on certain species of Salir (willow) and oviposits between their scales. 

 The gall is not formed by the Locustid, but by a Dipterous insect belong- 

 ing to the family of Cecidomyickr. Although I have never seen the eggs 

 deposited I have on a number of occasions found them within the galls, 

 but did not know to what insect they belonged until Mr. AVheeler pub- 

 lished (loc. tit.) his excellent account of the oviposition of this species. 

 From that I quote as follows: " On September 8th I observed a female 

 in the act of ovipositon. She was perched with her head turned toward 

 the apex of the gall. Slowly and sedately she thrust her sword-shaped 

 ovipositor down between the leaves, and, after depositing an egg, as slowly 

 withdrew the organ in order to recommence the same loperation, after 

 taking a few steps to one side of where she had been at work. She soon 

 observed me and slipped away without completing her task. The num- 

 ber of eggs found in a gall varies considerably. Sometimes but two or 

 three will be found, more frequently from fifty to one hundred. In one 

 small gall I counted one hundred and seventy." The egg is cream colored, 

 very thin, elongate oval in outline, and measures 4x1 mm.* The young 

 emerge about the middle of May and reach maturity about August 10th. 

 Long-winged forms of this species are occasionally met with. 



On October 21 a pupa was taken which had a white hair worm ( Gordius) 

 8i inches long in its abdomen. 



En&iferum was first described from Illinois, and, as yet, has not been 

 recorded east of the Alleghany Mountains. 



ff. Abdomen with the dorsal surface a fuscous brown, the sides shining 

 black. 



-Mr. B. 1). Walsh, in the Proc. Ent. Soc. Phil., III., 18H4, 232, recorded the finding, on 

 numerous occasions, of the eggs of an Orchclimum in the turnip-shaped galls of Salix 

 cordata. Their shape and proportional dimensions, as given by him, differ much from 

 those of X ensifcrum, as they were cylindrical, .10 to .17 of an inch long, and seven 

 times as long as wide. 



