A minute Hymenopteron 

 Aspidiotiphagus Schoeversi n. sp, 



by 



C. A. L. Smits van Bürgst, (The Hague). 



(Plate 13). 



In ,, Entomologische Berichten" of November 19 14 I gave 

 a description of an almost invisible new hymenopterous 

 insect named Litus nigriceps and belonging to the subfamily 

 Mymarinae. Two specimens of this new species, $ and <$ , 

 were issued from insecteggs, probably from the eggs of 

 some Homopteron, at the laborator}- of the Phytopathological 

 Institute at Wageningen. 



In September of the same year 16 specimens of an other 

 very minute Hymenopteron were bred at the laboratory 

 afore-said from So of Ckionaspis aspidistrae. The host, 

 from which the parasites were issued through circular holes, 

 cut through their elliptically shaped white scales, was dis- 

 covered in a greenhouse at Gouda on a leaf of Aspidistra. 



Both species, above mentioned, were reared by Mr. T. 

 SCHOEVERS, assistant of Prof. J. RlTZEMA Bos, director of 

 the Institute afore named. Their représentants belong to 

 the smallest insects known, being not quite one third of a 

 millimeter in length. Insects of this group are sometimes 

 observed on the surface of windows, and are only visible 

 when seen against the light and in motion. • In Germany 

 these minute insects are called „Augenstaub", also „gefugelte 

 Atomen". 



Four of the sixteen specimens above referred to were 

 sent to me prepared for the microscope and mounted on a 



