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50/. 

 HECABOLUS SULCATUS. 



Order Hynienoptera. Fam. Ichneunionidae. 



Type of the Genus, Spathius sulcatus Curt. 



Hecabolus Hal. MSS. — Spathius Curt. 



Antenna; inserted near the centre of the face, approximating, as 

 long as the head and thorax, composed of 24 joints in hoth 

 sexes, basal joint stout, subovate, 2nd globose, 3rd nearly as 

 long as the 1st and almost linear, the remainder gradually de- 

 creasing in length, the apical joint conical (1, the base and apex). 

 Labrum undiscovered. 



Mandibles stout, subtrigonate, obtusely bifid, with 2 or 3 bristles 

 outside (3). 



MaxillcE membranous, with a lanceolate internal lobe, and a 

 larger more ovate and pilose external one. Palpi long, rather 

 slender and bristly on the inside, 6-jointed, basal joint minute, 

 2nd elongate-ovate, the remainder twice as long, scarcel)' de- 

 creasing in length, 3rd and 4th rather stout (4). 

 Mentum elongate subconic. Lip broader and subcordate. Palpi 

 rather short, hairy, compressed and 4-jointed, 1st and 2nd joints 

 the shortest and broadest, suborbicular. 3rd and 4th joints longer 

 and slender, the former subclavate, the latter conical at the 

 apex (5). 

 Head spherical : eyes rather small and globose : ocelli 3 in triangle on 

 the crown of the head. Thorax elongate-ovate. Abdomen clavate, 

 gradually attenuated to the base, having no petiole : ovipositor longer 

 than the insect. Wings pubescent and ciliated, superior with a 

 thickened stigma, a long marginal cell, a rhomboidal and a long sub- 

 marginal one, and a discoidal cell equal in size to the 1st submarginal 

 one : inferior wings with 2 longitudinal nervures and 2 or Z radical 

 cells, the male having a thickened stigma near the base (9 S)- Legs 

 moderate, posterior a little the largest ; thighs a little incrassated and 

 clavate: tibiae short and simple: tarsi 5 -jointed, basal joint the longest, 

 4th the smallest, claws and pulvilli distinct (8). 



Sulcatus Curt. Guide, Gen. 545". 5. 



Pitchy shining black, antennae pale ferruginous, dusky towards 

 the apex, a ferruginous spot sometimes behind each eye ; disk 

 of the thorax, postscutellum, 2 first joints of abdomen and the 

 base of the 3rd finely striated with minute punctures between 

 the lines, 2nd joint in the female more or less ferruginous and 

 the ovipositor deep ochreous, tips of the sheaths black : wings 

 iridescent, nervures and stigma piceous: legs ferruginous brown, 

 upper side of thighs darker as well as the tips of the tarsi. 

 In the Cabinets of Mr. Rudd and the Author. 



