Hymenoptera aculeate. 9 



.37 Crocisa nubica Lep. Two oV, Kharthum 2 i, 1 ii. 

 [Nubia]. 



38. Crocisa jsegerskioeldi Morice n. sp. One c% Khartum 2 i, 

 one 9, Khartum 31 i. 



Nigra vel obscure cyanescens, pilositate alba (partim strata 

 ae subsquamosa, et in certis aspectibus plus minusve cserule- 

 scente) opulentissime variegata. 



Forma scutelli (apice sinuose emarginati et in medio pro- 

 funde angulatim excisi) Crocisw scutellari proxima; sed differt 

 pilositate magis ut in C. ramosa disposita (mesonoti vittis late- 

 ralibus integris, abdominis segmenti primi basi vix interrupte 

 fasciata etc.). Magnitudine utramque speciem multo superat (18 

 —20 mill, long.!), et ab omnibus mihi quidem cognitis Crocisis 

 differt scutelli ipsius disco in utroque angulo laterali-basali macula 

 bene definita pilositatis cserulescenti-albee ornato. 



<?. Abdominis segmentum dorsale septimum apice utrinque 

 dentato, inter hos dentes fere recte truncato. 



Antennarum articulus 3 US in utroque sexu 4 t0 fere sesqui- 

 longior. 



Examples which, I think, belong to this very large and 

 handsome species are placed in the British Museum with others, 

 apparently not belonging to it, under the name scutellaris F. 

 But what recent authors (e. g. Friese in "Bienen Europa's") iden- 

 tify with Fabricius's species is a much smaller and less striking- 

 looking insect, with snow-white markings, naked scutellum, and 

 nearly naked base to the first abdominal segment. 



In jcegerskiceldi the white pilosity in both sexes is very 

 copious, arranged almost exactly as in ramosa, buth with a pe- 

 culiar bluish reflection in certain lights which distinguishes it 

 at a glance from any European species. The actual hairs seem, 

 however, to be pure white, and it is only where they are pro- 

 strate that the blue effect appears. I imagine that the underlying 

 or surrounding subcyaneous chitin is either seen through them 

 or reflected by them in some way (the tint is just that produced 

 by a thin layer of Chinese white over a wash of black or dark 

 blue paint). 



The almost complete absence of reliable structural charact- 

 ers, even in the males, makes the proposal of new Crocisa species 



