470 ICirNEUMOXID.T. 



species, of which however I have no other knowledge. It agrees 

 better witli Gravenhorst's variety from Breslau ihim with the 

 typical Hannoveriaii female ; elsewhere it is only recorded by 

 Thomson from Sweden. 



Genus DIOCTES, Forst. 

 Diodes, Fiirster, Veili. ])r. Klieiul. 18G8, p. 1-53. 



Genotype, D. trochanterafa, sp. n. 



Head posteriori}^ constricted ; mandibles stout and equidentate ; 

 cheeks obsolete ; clypeus apically rounded and basally not discrete 

 from the very slightly convex, parallel-sided and subtransverse 

 face; eyes internally broadly emarginate; ocelli remote and not 

 large. Antenna; shorter than the body, with the scape entirely 

 pale. Metauotal area; strong and entire ; petiolar area distinctly 

 excavate; spiracles circular. 8cutellum not strongly deplauate or 

 broader than long, with no carina^, and the basal sulcus elongately 

 pilose. Abdomen compressed from base of third segment ; basal 

 segment not elongate, widened from the centre ; petiole glabrous 

 and linear, postpetiole somewhat strongly subfusiform, with sparse 

 pilosity and the spiracles at its centre ; anus not clavate ; terebra 

 half tlie length of the abdomen, with the spicula reflexed. Tro- 

 chanters entirely pale ; hind tibijc blackish, at both extremities. 

 AVings with the stigma narrow; areolet wanting ; radial cell not 

 broad and very obtusely angled centrally ; anal nervure emitted 

 from centre of first recurrent ; hind A\ings with the uer\ellus 

 straight, vertical and not intercepted, all apical nervures wanting. 



Mancje. Palcearctic Region. 



This genus agrees with Hymenohosmina, in the internally parallel 

 and emarginate eyes, and in lacking an areolet ; but it differs 

 materially in the circular metathoracic spiracles, short cheeks and 

 basal segment, and to a less extent in the equidentate mandibles, 

 shorter antennae, longer scutellum, stout postpetiole and sub- 

 convex face. It is very probable that a great number of species 

 falling here are to be met with in India, though too little collect- 

 ing has at present been effected to speak with any degree of 

 certainty. 



The above generic characters are drawn from D. trochanter ata, 

 since Forster's description is most meagre. 



Table of Species. 



1 (4) Calcaria sliortev thau half the 



metatarsus ; abdomen black. 



2 (3) Scape beneath and the hind femora 



fulvous apostata, Grav., p. 471. 



3 (2) Scape i^ale throughout ; hind fe- 



mora black tyocha)derata, sp. n., p. 471. 



