1922] Bezzi: South American Chiromyza 123 



Head entirely yellowish, the occiput whitish, dusted; ocellar plate 

 black; occipital border with a narrow white line and with erect black 

 hairs. Frons with a narrow, less distinct, dark transverse band on the 

 middle, whole length clothed with erect black hairs. Antennae entirely 

 yellowish, black haired. Hairs of the eyes black. Face with black hairs 

 on the sides; palpi reddish. Thorax on the back yellowish-brown, with 

 rather long dark pubescence; the middle of the dark longitudinal 

 stripes is abbreviated behind, divided along the middle by a pale line, 

 but the lateral ones are not distinct. Pleura pale yellowish, unspotted, 

 with rather long hairs on the mesopleura, and with longer ones on the 

 metapleura. Scutellum like the thorax, with short dark pubescence. 

 Halteres pale yellowish, dirty on the knob. Mesonotum pale yellowish. 

 Abdomen yellowish above, rather shining, with blackish pubescence; all 

 the segments are narrowly black on the sides ; venter pale yellowish ; geni- 

 talia quite reddish, even on the upper lamella and lateral appendages. 

 Coxae and legs entirely pale yellowish, the last tarsal segments only being 

 blackened; coxae clothed with rather long black hairs, even the black 

 pubescence of the remainder of the legs being longer than usual. All the 

 femora are equally thin; front tibiae thin, much more slender than the 

 others; claws proportionally short; the three pulvilli dirty yellowish. 

 Wings grayish hyaline, with dark yellowish veins, the basal portion of 

 the fourth longitudinal vein being whitish. 



ADDITIONAL NOTE. 



Having received a paratype of Boreoides subulatus, through 

 the courtesy of Mr. G. H. Hardy, and comparing it with the 

 types of Boreoides tasmaniensis I have found: 



(a) That the differences in the annulation of the third antenna! joint and in 

 the position of the hind coxae are not consistent, these organs being not differently 

 shaped or located in both the species. 



(6) On the contrary the differences in the form of the scutellum, in the length 

 of the wing-rudiments and in the coloration of thorax, are of great importance. 



I find, moreover, that the legs of tasmaniensis are thinner and more 

 slender than in subulatus, which is chiefly evident in the tarsi, which 

 are not at all incrassated in the former. Even the color of the legs is 

 lighter in tasmaniensis, the tibis and tarsi being entirely yellowish, 

 while in subulatus they are in greatest part black. The two species are 

 without doubt distinct; and Mr. Hardy informs me that even in 

 AustraHa there are several different species of Boreoides not yet 

 described. 



ADDITIONAL NOTE (2). 



In the meantime a paper by Dr. Giinther Enderlein, Berlin, has 

 appeared (Ueber die phyletisch alteren Stratiomyiidensubfamilien, in 

 Mitteil. Zoolog. Mus. Berlin, X, 1921, pp. 153-214), in which a new 

 classification of the Chiromyzini is proposed, with the descriptions of 

 many new genera and species. 



