O NOTES ON CHALCIDTJE. 



Aptera. Caput prothorace multo latius. Antenna? subclavata?. 

 Abdomen fusi forme, convexum. Femora subincrassata. 



Male. — Body slender, elongate, convex, not bigh nor tumid. Head 

 and protborax sbiuing and somewhat smootb, being much less 

 punctured than they are in Isosoma. Head a little broader than the 

 protborax. Antennae 9-jointed, exclusive of the divisions of the club 

 and of the two ring-shaped joints that follow the second ; second joint 

 much shorter than tbe first, with which it forms a slight angle; third 

 and following joints with thin whorls of hair, successively decreasing 

 in length ; third much longer than the second. Protborax sub- 

 quadrate. Metathorax long, tapering hindward. Petiole very short. 

 Abdomen flat, linear, smooth, apparently subsessile, much shorter 

 than the thorax and ranch narrower than the fore part of the latter. 

 Legs slender, rather long. Fore wings long ; ulna much shorter 

 than the humerus ; radius a little shorter than the cubitus and not 

 more than one-third of the length of the ulna ; stigma very small. 

 Female. — Wingless. Head much broader than the prothorax. 

 Antennae subclavate. Thorax smoother than that of the male. 

 Abdomen fusiform, convex, as broad as the thorax, and equal to it in 

 length. Femora slightly iucrassated, stouter than those of the male. 



Philachyra ips, Holiday, MS. 



Mas. — Nigra, prothoracis maculis duabus tibiis anticis apice 

 genubus tarsisque fulvis, alis diaphanis. Fam. — Antennis basi 

 trochanteribus femoribus anticis apice genubus tarsisque luteis. 



Male. — Black. Prothorax with a tawny spot on each fore angle. 

 Fore tibioe towards the tips, knees and tarsi tawny. Wings pellucid ; 

 veins tawny. Female. — First joint of the antenna;, trochanters, fore 

 femora towards the tips, knees and tarsi luteous, the latter black 

 towards the tips. Hind part of the abdomen thinly beset with white 

 hairs. Length of the body 1 — 1 J line. 



A. H. Haliday wrote thus to me of the male of this species : — 

 ' Two questions arise ; first, is it the true male? I found it, though 

 beginning to appear later than the female, yet earlier than any known 

 species of Tsosoma came out, and in the same situation with the 

 female still continuing. Second, are the characters, antenna? and 

 proportions of the segments of the wing-vein sufficient to distinguish 

 it from Isosoma ? " 



Perhaps the opinions in the two following extracts from Dr. 

 Walsh's publications will be found to be not quite correct: — 



"If Eurytoma Hordei could with any propriety be referred to that 

 genus, we should then have a case of the same genus including both 

 parasitic and plant-feeding species ; and I do not believe that any 



