266 BRITISH ICHNEUMONS. [Aro/es. 



AROTES, Gravenhorst. 

 Gr. I.E. iii (1829). 446. 



Head shortly transverse with the eyes oval ; frons centrally and face 

 radiately carinate. Antennae somewhat slender and shorter than the 

 body ; of the female white-banded. Thorax convex and cylindrical ; 

 notauli very deep ; metathoracic area obsolete, basal area elongate, cos- 

 tulae emitted before centre ; petiolar area transstrigose. Scutellum con- 

 vex and triangular with its apex obtuse. Abdomen fusiform, subpetio- 

 late, as long as or a little longer than the head and thorax, narrower than 

 the latter and apically compressed ; basal segment elongate and canalicu- 

 late, a little dilated towards its apex, with the postpetiole twice longer 

 than broad and the lateral tubercles central ; the second segment almost, 

 and the remainder distinctly, transverse ; sixth and seventh ventral seg- 

 ments of 9 with the \alvulae concaA'e, vomeriform and produced beyond 

 the anus ; terebra as long as the body. Legs elongate ; the anterior 

 slender and the hind pair stout ; hind femora produced beneath, tibiae 

 arcuate ; tarsal claws entire. Wings somewhat ample with the areolet 

 wanting; second recurrent nervure is emitted by the cubital nearer the 

 base than is the submarginal ; basal nervure distinctly incrassate near 

 the costa ; nervellus strongly arcuate, subopposite and intercepting in the 

 centre. 



The strongly carinate frons, radiately strigose face, only centrally dis- 

 creted clypeus, longer lower mandibular tooth, elongate metathoracic 

 spiracles and basal area, the acuminate hypopygium, intumescent hind 

 femora and peculiarly dentate claws, as well as the incrassate basal ner- 

 vure and unusual position of the second recurrent nenure render this 

 genus abundantly distinct. 



Gravenhorst places it under Banchus and remarks upon the relationship 

 of this genus with Xorides irrigator in the conformation of the head and 

 basal segment, though the former is less globose ; also in its anal, pedal 

 and terebral construction with Acaetiiius, " sed habitu toto naturali, et 

 characteribus exhibitis conjunctim sumtis, Arotae satis ab omnibus illis 

 subgeneribus discerni possunt." Marshall in his 1872 Catalogue, for 

 want of a better (since no intemiediate author had referred to the subject) 

 left this genus in the above position; but Ashmead in iqoo, following 

 Forster's nomenclature, very correctly transfers it to the Acaenitini. Few 

 authors, however, appear to have been acquainted with it and I found it 

 necessary to draw largely from the examples in the British Museum for 

 the smaller and more important characters. 



