Dec.,1909.] Matausch : Gynandromorphic Membracid/e. 165 



GYNANDROMORPHIC MEMBRACID^. 



By Ignaz Matausch, 

 Newark, N. J. 



(With Plate XIII.) 



While sorting over some insects, I ran across a rather small' ap- 

 parently female, specimen of Telia bimacnlata (Fabr.) collected two 

 years ago by Mr. Wm. T. Davis on Staten Island, N. Y. On closer 

 examination I saw that it exhibited an abnormal form of the sexual 

 organs which suggested that it might be a gynandromorphic indi- 

 vidual. At the suggestion of Professor Wm. M. Wheeler, I studied 

 a series of nymphs which were not fully developed and found that 

 the insect in question was entirely similar to the young males, since 

 the traces of the ovipositor present in the females were completely 

 absent. 



Bearing this case in mind while collecting during the past season, 

 I found the occurrence was not unique. Mr. E. A. Bischoff collected 

 five specimens of Telia at Rahway, N. J., on August of the present 

 year, and among them was a similar abnormality with the form and 

 color of the prothorax modified, showing that other parts of the 

 body may also become implicated. 



Among five specimens of Telamona ampelopsidis Harris, I found 

 a sexual form of the same sort ; and in another species of Telamona, 

 which I collected on sweet gum fully 50 per cent, of the specimens 

 were abnormal ! They varied from the above mentioned form to 

 ones which showed scarcely any traces of genitalia, and still others 

 with scarcely a trace of the last abdominal segment. 



Figs. I and 2 on Plate XIII show the abdomen of the normal 

 female Telia bimacnlata from the left side and in ventral view, Figs. 

 5 and 6 the abdomen of the normal male in corresponding positions. 

 In Fig. 50 the genitalia of this sex are represented as seen from 

 behind. Figs. 3 and 4 show the abdomen of the gynandromorphic 

 specimen seen from the left side and in ventral view- 



