Vol. XXX l] ENTOMOLOGICAL NEWS 169 



Ventral spines of femora of legs more strongly developed than in the 

 female. Tibia of second legs beneath with the usual two stout basal 

 spines, with no group of smaller ones distad of them such as found in 

 oaxacensis; on the anterior face a double and in part triple series of short 

 stout spines which are typically from thirty to forty in number. Coxae 

 of fourth legs each with a prominent conical apophysis beneath. Coxae 

 of first legs with the usual chitinous hook. The median apophysis (clavis) 

 of the bulb of the male palpus formed almost exactly as in vertebrata, the 

 larger lobe not expanded at all distally. 



cf. Length to 14 mm. Length of cephalothorax 7 mm.; width 6 mm. 

 Length of tib. + pat. I, II mm.; of tib. + pat. IV 9.2 mm. 



9. Length to 15 mm. Length of cephalothorax 7.4 mm.; width 6.2 

 mm. Length of tib. + pat. I 10.5 mm.; of tib. + pat. IV 10 mm. 



Notes on Gonatopus ombrodes, a Parasite 

 of Jassids (Hymen., Homop.)* 



By C. N. AINSLIE, U. S. Bureau of Entomology. 



On July 10, 1910, in Fort Collins, Colorado, a jassid, a 

 female Cicadula 6-notata, flew to a lamp by which the writer 

 was seated and attracted attention by her peculiar behavior. 

 She seemed deformed, walked jerkily and was continually 

 flipping her wings. A lens disclosed a small striped sac pro- 

 jecting from or attached to the abdomen between the fourth 

 and fifth segments. This jassid was captured and mounted 

 in balsam for future study. 



Since that date a number of leaf hoppers aflicted in a 

 similar manner have been taken in various parts of the middle 

 west and a few adult parasites have been reared from these. 

 The object of the present paper is to offer some facts that 

 have been gathered regarding the habits of these parasites. 



The writer is indebted to Mr. S. A. Rohwer, a systematist 

 of the Bureau of Entomology, for a determination of the 

 parasite and for helpful criticisms of this paper, and to Mr. 

 D. M. DeLong of Harrisburg, Pennsylvania, who kindly 

 determined the jassid hosts concerned in this study. 



It may be said at the outset that while this parasite may 

 possibly attack jassids more or less promiscuously, regard- 



*Published by permission of the Secretary of Agriculture. 



