﻿628 Prof. Mario Bezzi's Ueport on a Collection of 



petiolate at the base; the origin of the second vein takes 

 place much before the small cross-vein, and the anal cell 

 is of equal size throughout its length (whence the name, 

 isos and tamcion). 



Face but little projecting ; antennae sliort, widely separated from 

 each other ; the third joint short, the styliform portion terminating 

 in a short style, l^ times the length of the whole antenna. Proboscis 

 2^ times as long as the head. Eyes with a deep indentation. Mouth 

 opening A'ery broad. Legs of the Exoprosoj^a type ; claws very 

 small ; hind claws with a basal tooth. 



Wings very long and narrow, at the base elongately cuneate, anal 

 lobe and alula absent ; prealar hook small ; no basal comb. First 

 vein distant from tlie costa, the costal and subcostal cells therefore 

 broad ; second vein strongly bent at the tip ; marginal cell broad ; 

 three very large submarginal cells ; four posterior cells all open . 

 anal cell in its middle as broad as at the end, or only a little broader 

 at end ; discal cell on the middle of the wing, short, not broader 

 than the second basal cell ; small cross-vein placed a little after the 

 middle of the discal cell ; the vein dividing the third from the fourth 

 posterior cell placed towards the middle of the discal cell, which 

 there makes a jjrotuding angle ; the third longitudinal vein begins 

 in a right angle before the small cross-vein, at a distance from this 

 which is two or more times the length of the veinlet. The width of 

 the cells on the anterior portion of the wings and the narrowness of 

 those on the hind portion are so striking that the third longitudinal 

 vein becomes therefore placed a little behind the median axis of the 

 wing. 



89. Isotamia daveyi, sp. nov. (Plate L, fig. 7.) 



Ç . Length of the body 7 mm., of the proboscis 4 mm., of the 

 wings 7 mm. 



A black and black-haired species, with pale pubescence on the 

 thorax and abdomen, and with the anterior half of the wing 

 blackened. 



Frons with sparse, pale tomentum ; hind margin of the eyes with 

 a narrow white border; antennae and proboscis bhack. Thorax and 

 scutellum with yellow pubescence ; hind margin of the scutellum 

 with whitish tomentum ; the hairs black, but in the middle of the 

 front part there are a few yellow hairs ; pleurae covered with strong 

 and rough black bristly hairs ; metapleural hairs also black. 

 Squamulae less distinct ; haltères black. Abdomen black, with yellow 

 and white pubescence ; the second segment bears a broad band of 

 white tomentum ; the hairs on the sides of the first segment are 



