ON THE SPECIES OF PLATYGASTER. 273 



conspicuse : scutellum breve, quasi semicirculum fingens : metatho- 

 rax mediocris, utrinque angalatus : abdomen longi-ovatum, con- 

 vexum, thorace multo angustius ; segmentum 1™. breve, latum ; 

 2 um . maximum ; sequentia brevissima subclavata ; tibiae tarsique 

 gracilia. 



Sp. 8. Ino. Mecrida. Mas et Fem. Atra, pedes nigri tarsi 

 picei, albo-Umpidce. 



Mas. — Atra, brevis, lata, nitens, laevis, fere glabra : oculi ocellique 

 nigro-picei: antennae nigrse, easdem Eurytomce simulantes, 

 corpore paullo breviores ; articulorum petioli picei : metathorax 

 abdominisque segmentum l um . scabra, obscura ; 2 um . basi scite 

 sulcatum : pedes nigri ; genua et tarsi picea ; propedes picei, 

 genua, tibiae apice subtus et tarsi flava : alae albo-limpidae ; squa- 

 mulae et nervi picea. (Corp. long. lin. \ ; alar. lin. \.) 



Found near London. 



** Tarsi tetrameri. 



Genus III. — Iphitrachelus, Holiday. 



Mas. — Corpus breve, latum : caput thoracis latitudine : oculi pro- 

 minentes: antennae 10-articulatae, nodosae, verticillato-pilosae, 

 easdem Eurytomce simulantes, corpore paullo breviores ; articulus 

 l us . crassus, quasi membrana inclusus ; 2 US . parvus, fere rotundus ; 

 3 US . major, longi-ovatus ; 4 US . adhuc major, dilatatus ; 5 US . et 4 US . 

 sequentes aequales, discreti ; 10 us . fusiformis, acuminatus, 9°. 

 duplo longior : thorax brevis, convexus, paullo longior quam 

 latus : prothorax supra inconspicuus : mesothoracis parapsidum 

 suturse bene determinate ; scutellum gibbum, fere rotundum, 

 scuto discretum : metathorax mediocris ; stria supra dorsum 

 membranacea, quasi foveas 3 fingens : abdomen longi-ovatum, 

 sublineare, fere planum, thorace multo angustius ; segmentum 

 l um . breve, membrana tectum ; 2 um . maximum, dorsum fere 

 omne occupans ; 3 um . et sequentia brevissima : pedes graciles ; 

 femora subclavata ; tarsi tetrameri, articuli 1°. ad 3 um . longitudine 

 decrescentes, 4 US . 3°. paullo longior, ungues et pulvilli minuti : 

 proalae humerus brevis, simplex, capitatus. 



Sp. 1. Iphi. Lar. (Haliday.) Mas. Ater, pedes flavi, alee 

 fuscce . 



Ater, obscurus, glaber, scitissime squameus : caput breve : oculi 

 ocellique nigro-picei : antennae nigrae ; articulus l us . fulvus ; 2 US . 

 NO. III. VOL. III. N N 



