350 Mr. Walker on the British Chalcidites. 



dance on Tresco, one of the Scilly islands, by Miss White of that 

 place. Mr. Woods has gathered Brassica Cheiranthus on the sands 

 near Penard Castle, near Swansea ; and Potamogeton plantagineus 

 exists in Sir J. E. Smith's herbarium, gathered by Mr. D. Turner, at 

 Diss, in Norfolk, and Dr. H. Thompson, in the south of Scotland. 

 In the herbarium of Dr. Johnston, of Berwick, is a specimen ob- 

 tained by Dr. R. D. Thompson in Ferny Rig marsh, Berwickshire, and 

 I possess a sample of it, gathered by myself in Bottisham fen, Cam- 

 bridgeshire. In all these cases the plant has been referred to a wrong 

 species, but was suspected to be distinct by Dr. R. D. Thompson. 

 I have lately gathered Atriplex rosea on the coasts of Holy Island 

 (Lindisfarn), Berwick, and the Forth near Newhaven, and Mr. 

 Borrer has sent it to me from the Sussex coast. 

 St. John's College, Cambridge, Oct. 27, 1838. 



XLI. — Descriptions of British Chalcidites. By Francis Walker, 



F.L.S. 



[Continued from p. 205.] 



Sp. 36. Cirr. Cyrrhus, Fem. Cyaneus, antenna; nigrce, pedes cyanei, tarsi 

 fulvi, protibicejlavcp, alee limpidce. 



Obscure cyaneus : oculi ct ocelli rufi : antennae nigras ; articuhis 1"' ni- 

 gro-cyaneus: pedes cyanei; trochauteres fulvi; genua flava ; tarsi fulvi, basi 

 flavi, apice fusci ; propedum tibiaj flavse cxtus fulvo vittatic, tarsi pallide 

 fusci: alae limpidge ; squamulae fiisca;, anticc cyanese ; nei'vi fusci. (Corp. 

 long. lin. I ; alar. lin. 1 .) 



June, near London. 



Fem, Corpus gracillimum, sublineare, nitens, scitissime squameura, parce 

 hii-tiim : caput transversum, breve, convexum, tliorace latius : antennae 

 graciles, extrorsum crassiores, corporis dimidio longiores ; avticulus 1'"* gra- 

 cilis, sublinearis ; 2"^ longicyathiformis ; 4"^ 3° brevior ; 5"* adhuc brevior ; 

 clava fusiformis, acuminata, articulo 5° plus dimidio longior : thoi-ax longi- 

 ovatus, convexus : prothorax brevissimus, supra vix conspicuus : mcsotbo- 

 racis scutum latitudine longius ; parapsidum suturae bene determinatae ; scu- 

 tellura broviconicum, metatborax transversus, mediocris : pctiolus brevissi- 

 mus : abdomen longi-fusiformc, thorace multo longius, supra planum, subtus 

 carlnatum, apice acuminatum : oviductus exertus, brcvis : pedes graciles : 

 alis nervus ulnaris humerall longior, radialis vix ullns, cubitalis sat longus. 



Sp. 37. Cirr. Mycerinus, Fem. Cupreus viridi-variiis, antennce fuscce, 



pedes fulvi ; altB limpidce. 

 Nigro-cupreus : oculi et ocelli rufi : antennae pallide fusca?, subtus fulvae : 

 thoracis latera viridi-varia : oviductus vaginae nigrae : pedes fulvi ; coxae 



