282 



tAvice as long as broad, ovate, 3'"' — 10"' joints of about even 

 length. Each joint a little narrower at base than at apex. 

 The last joint longer than broad, voidest at base, accumi- 

 nate at apex, contracted a little behind middle so that the 

 joint appears devided in two parts. The joints sparingly 

 clothed Avith short, rather stiff hairs. Thorax hardly as 

 long as broad. Scutellum plainly visible, halfmoon shaped, 

 feebly convex in front. Wings hairy, the border with a 

 fringe of hairs more than half as long as the greatest width 

 of the wing. Basal nerve plainly visible, little marginal 

 and a long stigma nerve. Nerves pale. Abdomen small 

 roundish, flatter than in the ?, joints 1 and 2 short, 3 

 much longer and half as long as broad. The whole insect 

 clothed diffusely with small light hairs. Thorax finely 

 granulated, dull black, head black. Abdomen black, shining. 

 Legs long, pale honney-yellow. Tibial spurs small, tarsi 

 5 -jointed. 1"' joint three times as long as 3^'' and 4*'\ 2"'' 

 joint somewhat longer than 3'''* and 4"', and 5"' joint twice 

 as long as 3'"'' and 4*''. 



Total length of insect: 0,3 ram. 



Length of forewing: 0,3 mm. 



Salius sang'uinoleiitus Fabr. Previously the transfor- 

 mation of this species was unknown. As I have been suc- 

 cessfull in breeding the species, and as its method of living 

 is somewhat different from the other Pompilids I shall add 

 a few remarks here about it. 



Its host is the female of Cheiracanthium camifex Fabr. 

 This female spins the tops of some grasses together and in 

 the middle of them arranges a completely enclosed bell in 

 which it lays its eggs and also remains itself until the youngs 

 are hatched. Upon opening one of these bells, 1 discovered 

 a parasite larva upon the spider, and with further researches 

 I discovered that on some of these females the parasite's egg 

 was attached and upon others a larger or smaller larva. 

 When this spider was attacked either with the parasite's 

 eg^ or larva, no attemp had been made to lay its own 

 eggs, but was however quite living, and defended itself 



