56G Mr. John l^ott's Monor/raph of the 



Curt. B. E. xl. 492 and \A.\ Zett. I. L. 30G, 1; Am. 

 et Serv. Ilcm. 590, 1; Fiirst. Verb. Vcr. lllieinl. v. 

 91 ; Flor, llhyu. Livl. ii. 542, 1; Letli. Hem. Nord, 

 cd. ii. 95. 



Brownish or reddish-pink. Ehjtra pale fuscous-tes- 

 taceous; very finely wrinkled transversely. 



Head: crown brownish or reddish-pink. AntenncB red 

 or reddish-pink; 4 — 8 joints Avhite, 9 — 10 black; 2nd 

 somewhat pyriform or conate, apex truncate, at least three 

 times longer than the 1st. 



Thorax: ;;/-f^-and meso-notam brownish or brownish-red. 

 Elytra pale fuscous-testaceous, seniitransparcnt, very 

 finely wrinkled transversely; nerves eoncolorous; dorsal 

 marginal nerve Avhitish, with minute fuscous spots at some- 

 what regular intervals between the apex of the clavus and 

 that of the radius. Legs pale yellow. Cluws broAvnish. 



Abdomen above fuscous-yellow or brownish, sometimes 

 with the posterior margin of the segments very narrowly 

 pale reddish; imderneath yellow. 



Length 1 line. 



On rushes {Juncus conglomeratus), &c. everywhere fi'om 

 June to the end of August. 



The following descriptions are extracted from Forster's 

 INlonograph, so copiously referred to in this ])aper. All 

 the species had been taken either by JNIr. Haliday or Mr. 

 "Walker, or sometimes by both, and Avere sent to and 

 determined by Dr. Forster. Specimens of none of these 

 have come under my notice. 



Species 21. Psylla uhni. 



Chermes uhni, Lin. F. S. 262, 1002; S. N. ii. 737, 2; 

 Fab. E. S. iv. 221, 2; S. Ii. 303, 2; Fsylla Ulmi, 

 Forst. Verb. Ver. liheinl. v. 71, 5. 



Green, with a slight mixture of yellow ; extreme tip of 

 the antennre brown, — $ sometimes the last joint, 2 the 

 two last (or the antennai are entirely yellowish). Face: 

 lobes somewhat long, broad from the base to the middle, 

 but from there to the apex perceptibly smaller. Elytra 

 clear, transparent; nerves pale yelloAv. 



Note. — Nothing is said about the stigma. 



This species was taken by Mr. Walker. 



