14 NOTES ON CHALCIDLE. 



E. plumata : from the latter species, which it rivals in size, it differs 

 in the structure of the antennae. 



England. In Dr. Chapman's collection. 



E. melanonecra. — Fam. Nigra, robusta, fortiter punctata: 

 antenna? subclavatae, breves ; abdomen glabrum, subfusiforme, thorace 

 brevius, apice lanceolatum ; pedes nigri, femoribus basi genubus 

 tarsisque fulvis, tarsis anticis piceis ; alae diaphanae, nigro venosae. 



Female. — Black, stout. Head and thorax largely punctured. 

 Head a little broader than the thorax. Antenna? subclavate, much 

 longer than the breadth of the head. Abdomen shorter than the 

 thorax, subfusiform except the apical part, which is lanceolate. 

 Femora tawny towards the base ; knees and tarsi tawny ; fore tarsi 

 piceous. AVings pellucid ; veins black ; ulna thick, about one-fourth 

 of the length of the humerus ; cubitus about half the length of the 

 ulna, rather shorter than the radius. Length of the body \% line. 



The longer abdomen distinguishes it from E. tumida. 



Barnstaple. In the collection of the Rev. T. A. Marshall. 



Genus ISOSOMA. 



I. clavicornis. — Fcem. Nigra, subtiliter punctata; antennae 



clavatae, breves ; prothorax fulvo bimaculatus ; abdomen glabrum, 



subfusiforme, thorace non longius ; pedes nigri, genubus tarsisque 

 fulvis ; alae albae, venis pallide testaceis. 



Female. Black. Head and thorax finely punctured. Head a 

 little broader than the thorax. Antennae clavate, a little longer than 

 the breadth of the head. Prothorax with two tawny humeral spots. 

 Abdomen nearly fusiform, not longer than the thorax, with a few 

 white hairs towards the tip. Knees and tarsi tawny. Wings white ; 

 veins pale testaceous ; ulna less than half the length of the humerus ; 

 radius a little more than half the length of the ulua ; cubitus a little 

 less than half the length of the ulna. Length of the body 1 J line. 



The comparatively long abdomen distinguishes it from I. verti- 

 cillata, crassicornis, hyalipennis, angustata; the stouter boJy from 

 I. minor, attenuata, pusilla, breviventris, tenuicornis ; the shorter 

 and more clavate antennae from I. linearis, Laothoe ; the broader 

 fore wings from I. angustipeunis ; the paler wings from I. depressa; 

 the paler wing-veins from I. brevicornis, petiolata, longicornis, cornuta, 

 brevis, Nepe, vacillans. 



England. 



I. melanomeua. — Mas. Nigra, gracilis, subtiliter punctata; 

 antennae corpore paullo breviores; prothorax piceo bimaculatus; 



