MONOGRAPHIA CHALCIDUM. 21 



abdomen nitidum, glabrum : tibiae anticse tarsique fusci : genua 

 pallida rufa : alas hyalinae, nervis pallide fuscis. (Alarum lon- 

 gitude, If lin.) 



The wings in this species are more hyahne than in most of 

 the preceding : in length, the antennae are equal to three- 

 fourths of the body, and exceed those of Isos. minor, breve, 

 or elongatum. 



End of May; Southampton. 



■\"\-f ProlJiorax fulvus. 



Sp. 20. Isos. fulvicolle. Fem. Nigrum, prothor ace 2iedib us- 

 que fulvis, alts pallide Jlavescentibus. 



Caput obscurum : oculi rufo-fusci : ocelli rufi : thorax punctatus, 

 antice rufus,maculis duabus lateralibus albidis : petiolus obscurus, 

 punctatus : abdomen nitidum, glabrum : oviductus apice fulvus : 

 antennarum articulus primus, secundus apice, tertiusque basi, 

 fulvi : femora intermedia basi nigro-fusca : tarsi apice fusci : alse 

 hyalinae, pallide flavescentes, nervis concoloribus. (Alarum lon- 

 gitudo, li — 1| lin.) 



The prothorax of this species is fulvous, the posterior 

 margin black, the anterior with a white spot on each side : 

 the basal joint of the antennae, the tip of the second joint, and 

 the ring-shaped third and fourth joints, are fulvous : the 

 intermediate thighs have a dark fuscous spot on each, near the 

 base : the fifth joint of the anterior, the fourth and fifth joints 

 of the four posterior tarsi, are fuscous. 



May ; amongst grass beneath trees ; Southgate. Septem- 

 ber ; Culver Cliffs, Isle of Wight. 



** Abdomen apice acuminatum, subcompressum. 

 Sp. 21. Isos. depressum. Fem. Nigrum, prothorace antice 

 maculis duabus albidis, alts subfuscis. 



Caput obscurum : oculi ocellique rufi : thorax punctatus, albido 

 utrinque antice maculatus : petiolus obscunis, punctatus : abdo- 

 men nitidum, glabrum : antennarum articulus secundus apice, 

 tertiusque basi, fusci : pedes flavi, femoribus basi nigris, tibiis 

 4 posticis medio tarsisque apice fuscis : alse subfiiscae. (Alarum 

 longitudo, 2 — 2i lin.) 



Var. — Femora tibiseque 4 posticae nigrae : tibiae anticae medio fuscae. 



The semihyaline spots on the proscutellum are much larger 



