MINUTE HYMENOPTEROUS INSECTS. 591 



Oligosita stjbfasctata. (PL LXXIII. figs. 14-19.) 



Picea, capite et dorso thoracis fulvis, hujus parte postica picea, linea media longitudinali fulva, oculis 

 magnis, nigris ; antennis pedibusque fulvescentibus ; alis anticis nubila media pallide fusca notatis. 

 Long. corp. f millim. Expans. alar. 1^- millim. 



Habitat Richmond Park, comit. Surrey, mense Augusto capta. 



The antennae (fig. 15) are about twice the length of the head, and consist of a long 

 basal joint, more slender in the middle, a second joint, not quite half the length of the 

 first, followed by a minute annular joint, the fourth joint being rather smaller than the 

 second, and three terminal joints forming an elongate oval setose mass. 



The mandibles (fig. 16) are strong, horny, and terminated by four small obtuse teeth ; 

 the maxillae (fig. 17) are large, and terminated by a large fleshy setose lobe, having a 

 very short cylindrical and apparently exarticulate palpus, with two terminal short setae ; 

 the lower lip (fig. 18) is nearly of equal size with the maxillae, elongate-conic, rounded 

 at the extremity ; the labial palpi very small, slender, cylindrical, and terminated by a 

 small seta. The tarsi (fig. 19) are 3-jointed, terminated by a large pulvillus, with two 

 small lateral ungues. The fore wings are dilated at the hinder extremity ; they are well 

 clothed with fine setae, and their apical margin is fringed with very long hairs ; the sub- 

 costal vein is free for a short distance from the base of the wing, where it unites with 

 the margin, and extends to the middle of the wing, terminating in a very short and 

 nearly triangular stigmatic branch extending into the disk. The hind wings are very 

 narrow, with a prominent hook before the middle of the costal edge, the margins with 

 a fringe of long hairs, and a row of fine hairs on the disk. 



Amongst the numerous minute Hymenoptera collected at or near Colombo, in 

 Ceylon, by Mr. Staniforth Green, which he has mounted in Canada balsam and kindly 

 presented to me, are several Trichogrammce and allied species, of which I add descrip* 

 tions and figures as further illustrating the relations of JBrestwichia. 



Oligosita Staniforthii. (PL LXXIII. figs. 20, 21.) 



Tota luteo-fulva, oculis fuscis; antennis perbrevibus, geniculatis, articulo primo magno, secundo semiovali, 

 tertio annuliformi, quarto parvo subrotundato, reliquis tribus clavam longe ovalem formantibus ; alis 

 anticis subangustis, angulo antico apicali rotundato-truncato, longe ciliatis, disco parum setigero, 

 ramo stigmatico distincto, apice angulato-truncato ; alis posticis angustis, utrinque longe ciliatis ; 

 abdomine elongato-conico ; oviductu longitudine abdominis, e basi hujus exeunte, apice serrato. 

 Long. corp. O017 unc. 



Habitat in graminosis in insula Taprobana (D. Staniforth Green). 



The insect here described is a female, as shown by the exserted ovipositor (fig. 21), 

 which is finely serrated at the tip. The structure of its antennae and wings are very 

 clearly shown in the specimen, and lead me to infer that it cannot be generically separated 

 from 01. subfasciata. The peculiar form of the fore wings, which have the hind 

 margin straight and produced, whilst the anterior apical angle is rounded off, gives the 

 wings a form quite unlike that of any other Hymenopterous insect. 



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