250 



ON THE SPECIES OF PLATYGASTER. 



sublimpidse ; squamulae nigro-piceae. (Corp. long. lin. h — f ; 

 alar. lin. § — |.) 



Far. /3. — Mas, genua et tarsi pallidiora. 



Far. y. — Fern, genua et tarsi rufo-picea ; progenua et protarsi rufa, 



hi apice picei. 

 Far. I. — Fern, genua et tarsi nigro-picea, propedibus pallidiora. 



Found near London. 



Sp. 56. Plat. Orcus. Fern. Prcecedenti similis, aim 

 latiores. 



Ater, parum nitens, subtilissime punctatus, dense et breviter pubes- 

 cens : caput posticum transverse sulcatum : oculi ocellique nigro- 

 picei : antennae nigra : metathorax scaber : abdomen nitens, 

 lasve, glabrum ; segmentum l um . profunde sulcatum ; 2 um . longi- 

 ovatum, apice latius, basi ad medium scite sulcatum : pedes nigri, 

 validi ; genua et tarsi nigro-picea ; propedum genua, tibiae apice 

 subtus et tarsi pallidiora : alae obscure fuscae, apice latae obtusae ; 

 metalae subfuscae ; squamulae nigro-piceas. (Corp. long. lin. § ; 

 alar. lin. f .) 



Found near London. 



Sp. 57. Plat. Chrysippus. Fern. Abdomen quam prceceden- 

 tibus longius. 



Ater, obscurus, subtilissime punctatus, breviter pubescens : oculi 

 ocellique nigro-picei : antennae nigrae, capite thoraceque paullo 

 longiores ; articulus 2 US . apice fuscus : mesothoracis parapsidum 

 suturae optime determinatae : metathorax abdominisque segmen- 

 tum l um . scabra, obscura: abdomen nitidum, laeve, glabrum, con- 

 vexum thorace duplicato brevius, apicem versus minime incurvum ; 

 segmentum 2 um . ejus dimidio paullo brevius, basi scite sulcatum, 

 apice latius ; 4'"". et sequentia quasi telum fingentia; 6 ura . 5°. bre- 

 vius : oviductus pallide flavus, abdominis dimidio longius : pedes 

 nigri ; trochanteres et genua picea ; protibiae apice et tarsi rufo- 

 picea, subtus pallidiora : alae obscure fuscae ; squamulae nigro- 

 piceae. (Corp. long. lin. £ ; alar. lin. l£.) 



May ; on grass in fields ; near London. 



Sp. 58. Plat. Gorge. Mas et Fern. Ater, pedes rufo-picei, 

 alee albo-limpidce. 



Mas. — Ater, parum nitens, subtilissime squameus, breviter pubes- 

 cens : caput posticum sulcis transversis scite undatum : oculi 



