96 0- Kröber, 



brown fore border reacliing the apex, at base extending slightly 

 into the basal cells, and witli a brown cross-band wliich reaches the 

 anal cell; the fifth posterior cell is largely hyaline, the lo wer border 

 of band almost straight not extending into the basal cells, its upper 

 border irregulär, produced towards the base of fork of third longi- 

 tudinal vein and again at the fourth posterior cell; the apical spot 

 is narrow, the same width throughout, reaching exactly to the centre 

 of apex of wing. 



cJ. Smaller than the female, measuring 8 mm. 



Palpi blackish. First Joint of antennae nearly the same length 

 as the second, both darker in colour. Eyes join between the fiontal 

 triangle and the ocelligerous tubercle. Thorax with a wide media» 

 black stripe bordered by a yellow stripe, black beyond; sides yellow 

 with a black stripe, pubescence yellow, golden yellow on the sides. 

 Scutellum black. Abdomen similar to that of the female with the 

 exception of the first segment wliich is wholly black, only pale yellow 

 ■ou the sides, the black spots on second segment are larger and 

 leave only a small yellow dot in their centre, the middle yellow spot 

 on the two foUowing segments is smaller; underside yellow, black 

 at apex. Legs black, only the middle femora and first Joint of middle 

 and posterior tarsi pale yellow." 



18. Chrysops niakerowi Pleske. 



makerowi Pleske, in: Ann. Mus. zool. St. Petersbourg, Vol. 15 (1910), 

 p. 469, tab. 4 fig. 8a — d (Chrysops). 



$. Originalbeschreibung: Macula hyalinea, in cellula discoidali 

 Sita, nulla. Macula apicali cum fascia alari transversali juncta, latis- 

 sima, apicem versus dilatafa, margine fasciae alaris externa ad nervum 

 cuhitalem angulato, post illum concavo. Tihiis nigro-piceis, pedum medi- 

 orum parte basali flavescentibus. Callositatibiis facialibus cum callositatibus 

 genarum non junctis. Marginibus callositatum genarum externis cum 

 marginibus oculorum sub angulo recio divergentibus. Segmentis ventris 

 primo et secundo flavis, macidis nigris nofatis, reliqiiis nigris, marginibus 

 posterioribus flavis ornatis. 



Die 6 mir vorliegenden $$ dieser Art sind leider so ab- 

 gerieben, daß die Besclueibung nicht in allen Teilen auf die gleiche 

 Genauigkeit Anspruch erheben darf und namentlich die Behaarung 

 und Bestäubung, die häufig den Grundton der Fäi-bung wesentlich 

 abändern und zuweilen sogar ganz verdecken, bei dieser Art fast 



