[25] Chri/sotus Meig. 59 



bluisli-greeu rendered silvery by tomeiitum; antennae with tlie third Joint 

 ratlier large, iieither rouuded nor pointed. Thorax greeu in the middle, 

 coppery ou the sides, rendered dull by minute tomentum, halteres orange, 

 alulae bright yellow with pale yellow fringes. 



Legs greenish black, with yellowish knees, front coxae with con- 

 spicous white pnbescence, tibiae very slightly bristly, usnal bristle on 

 middle pair and two or three bristles on bind pair; in one specimen pro- 

 bably immature, the anterior tibiae and base of tarsi are brownish. Wiugs 

 rather dark with niore or less of a yellowish finge. 



5. Rather larger, more coppery, thorax very dull, face dull white, 

 about a quarter the width of the head, palpi rather large, whitish at the 

 tip: fi'ont coxae luteous at the extreme tip and there with yellow hairs, on 

 the disk with white hairs, femora slightly shining, tibiae brownish or 

 yellowish. Wings cleaner than in male. 



This species is evidently allied to C. suavis Lw., but is darker and 

 duller coloured, suavis beiug blue or Aäolet; the face of suavis is green 

 aud „mire angusta*' shining white near the antennae, while in palustris 

 it is all shining white, and not very uarrow, in fact rather broad for this 

 genus. Suavis has the legs and abdomeu with a whitish pubescence, and 

 yellow anterior tibiae, while I expect all nature palustris have only the 

 knees luteous. The female of suavis is greener, the face and frons dirty 

 grey. C. albibarbus Lw. is also blue or green with but little tomentum, 

 and no silvery shimmer on the frons. ' 



Anmerkung. Ich kenne diese Art nicht und habe daher die aus- 

 führliche Beschreibung von Verrall wiedergegeben. 



20. pennatus Lichtw., Termeszetrajzi Füzet. XXV, 197. 1 (1902) 



Europa merid. 

 Ich besitze diese Art aus Ungarn und Griechenland. 



21. pulchellus Kow., Verh. zool.-bot. Ges. Wien XXIV, 461. 3, tab. XIII 

 fig. 15 (1874) Europa. 



In meiner Sammlung ans Schlesien, Lappland, Süd- Frankreich, Korfu 

 und aus den Alpen. 



taeniomerus Zett. (nee Meig.), Dipt. Scand. 11,485, var. b (1843). 



? rhaphio'ides Zeit., Ins. Läpp. Dipt. 705. 3 (1838) ? Europa sept. 



Nur als Weibchen unkenntlich beschrieben, nmfs daher zunächst 

 zweifelhaft verbleiben. 



Noya Acta CIV. Nr. 2. 9 



