armatures in the Hymenopterous genus Golletes. 59 



kindness of Herr Friese, wlio actually allowed me to 

 dissect his only specimen. 



Its armature and seventh ventral plate seem to me as near 

 to those of marginatus as to any other species. But the 

 differences are considerable, and the unique external 

 structure of the insect makes me think it better to con- 

 sider it provisionally as standing alone in the genus. 

 Should other species Avith toothed scutellum hereafter 

 occur, it would be interesting to see how their " dissection- 

 characters " compare with those of grfeffei. 



29. Frigidus, Perez. PL VIII, 29, 29«. Pi. IX, 52. 



30. Succindus, L. PI. VIII, 30, 30a. PI. IX, 55. 



In these two species — which agree inter alia in the 

 peculiar foveation of the sixth ventral segment (PI. IX, 52) 

 — we come to a type of armature, etc. differing evidently 

 very much from that found in marginatus, etc. The 

 apices of the stipites are less conspicuous, more palpiform, 

 and not nearly so pilose ; the outlines of their central 

 portion straighter-^— see especially the apical truncation 

 and the exterior margin; the " wings " of the sagittse are 

 differently shaped, and though the latter have a secondary 

 dilatation between the base and the " wing " it is not at 

 all dentiform. The lobes of the seventh segment are not 

 elongate but very transverse, recalling those in the neigh- 

 bourhood of hracatus or picistigma, rather than those of 

 marginatus, and differing " toto cielo " from those of mon- 

 gollcus or montanus. In frigidus they are very hairy, and 

 very small in proportion to the size of the insect. In 

 succinctits they are much larger, nearly naked, and ex- 

 tremely transparent — so much so that under the microscope 

 their apical margin, unless most carefully focussed, is apt 

 to become altogether invisible. The costal thickenings in 

 succinctus are of a beautiful and most delicate yellow ; 

 and the segment is altogether so frail and membranous 

 that especial care is required to extract it undamaged. 



Frigidus seems to be exclusively a Mediterranean 

 species. My examples were received partly from the 

 author and partly from Mr. E. Saunders. 



Succinctus occurs universally from England and Scan- 

 dinavia to Egypt, and its dissection-characters, as far as I 

 can see, are everywhere the same. 



In this country I nearly always find it on the purple 



