MALLOPHORA NIGRITARSIS. 77 



Diogmites. The particular design on the abdomen is more 

 especially clearly indicated by Macquart: on both sides 

 of the second and following segments of the abdomen 

 there is a whitish dust, which in front is limited by a 

 black oblique patch ; in one of the two specimens this de- 

 sign is still visible ; in the other , which in all other re- 

 spects entirely agrees with it , it is effaced. 



Osten Sacken (1. c.) holds this species , although doubt- 

 fully, to be a synonym of Diogmites discolor Low (Dipt. 

 Amer. sept. Cent. VIL 37}. Indeed both species appear 

 to be nearly allied ; however there are points of difference, 

 and certainly the two specimens I have before me cannot 

 be identified with D. discolor, which must be much dar- 

 ker, for Low calls the abdomen black in cT and dark 

 brown in 9 ? whilst in both my specimens the ground-co- 

 lour of the abdomen is tawny and Macquart , in his descrip- 

 tion of Das. rufescens , merely says: » abdomen testace " 

 without making mention of the sex. According to Low 

 the palpi of D. discolor are provided with black hairs: in 

 the specimens of the Leyden Museum they are on the contrary 

 beset with fulvous hairs (Macquart says nothing of the 

 palps). Finally the wings of discolor are cinereous or dark 

 cinereous at the tip and the posterior margin: in my spe- 

 cimens there is but a feeble trace of grayish tinge at the 

 tip, whilst Macquart says: »ailes presque hyalines." 



6. Mallophora nigritarsis j Pabr. 



Dasypogon nigritarsis , Fabr. Syst. Antl. 168. 18. — 

 Asilus ead.. Wied. Dipt. ex. I. 208. 4G; id. Auss. Zweifl. 

 I. 479. 84. — Mallophora ead., Macq. Dipt. ex. L 2. 8G. 

 4. — Schin. Verb. zool. bot. Ges. Wien, XVII (1867). 

 386. 66. 



In the collections of the Leyden Museum there are four 

 male specimens and a single female from Brazil (Bescke) , 

 in my own collection two males, one of them labelled 

 » Suriname". In most respects all these specimens agree 



Notes from ttie Leyden IMusevini, "Vol. I"V. 



