495 



DESCRIPTLOX OF PLATES. 



Plate XXXIIl. 



1. Eukocbclcia iiiirahilis. female. 



2. BrucJioniorpha .s-/'?, ccjntainino- the ruptured larval sac of 

 Eukocbclcia. Several sacs are often found on a single hop- 

 per, and both nymphs and adults (long- and s'hort-winged 

 ali'ke) are affected. 



3. Phryitophrycs s[^.: the left tegnien and rudimentary wing 

 are displaced and show the em])ty sac, from which Chal- 

 cogonatof^ns dccointiis was bred. 



4. Xymph of Tartcssiis? in a much collapsed state, from the 

 sac on which was bred a female Prosaiitcoii chc!og\iioicIcs. 



Plate XXXIV. 



1. fiiiriiioscopiis sf^.. nym])h in ventral aspect, showing the 

 om])tv larval sac of a ycocJicloi!;\'iius dcsfnicfor, inserted in 

 the usual position behind the posterior coxae. 



2. Eitlcinioiiios sf^. with emj^y larval sac of Ncochclo'^ynus 

 coriaccKS inserted in the neck. 



3. AfliysaiiKS citrtisii, with emptv sac of Xcoi:_i>!!atol'!is bniii- 

 ncsccns placed on the abdomen. The left tegmen is some- 

 what displaced by the parasite. 



4. Eibiirnia sf^. n_\mph, shrunken and distorted, bearing two 

 emptv sacs of Haploijionafof'iis aincricaiuis. 



5. Coli:;ar pcraciitiis, nvmph much shrunken, with empty sac 

 of Paradryliiiis kocbclci Ijeneath the left tegmen. 



6. Pcrkiiisiclla sacclian'cida, n\-mi:»h much collapsed and dis- 

 torted, bearing two empt}- sacs of Pscitdoiioiiatopiis dicli- 

 roimis. This hopper is an Hawaiian example, that was in- 

 fected by a parasite imported from Australia, w'here it at- 

 tacked small graminicolous Libiiniia. 



7. Stoiocrauus dorsalis, nymp'h vvit'h empty sac of Pscudc\<^0Jia- 

 fopiis stcnocrani. attached between the bases of the teg- 

 minal pads. 



8. Priz'csa aphorplioroidcs? nymph much shrunken, and with 

 the long fan-like caudal fil'aments removed, bearing two 

 sacs of Paradryiiuis i'ciiator, one beneath the tegminal, the 

 other beneath the alar pad. In life the beautiful fan-like 

 filaments are turned back over the body, the parasitic 

 sacs are only seen wdien the tail is depressed. 



