192 



Mr. E. Saunders' Synopsis of 



at the apex ; sagittae covered with a raenibranoiis skin ; 2 , apex of 

 abdomen more or less acute; ventral 6th segment projecting be- 

 yond the dorsal. Anterior coxae of ^ with stout blunt spines. 



A genus of parasitic bees generally to be found near 

 the burrows of Megachile. 



(2) 1. External spur of hind tibise blunt 

 (1) 2. External spur of hind tibiffi sharp. 



(6) 3. ^ with the 4th abdominal segment deeply emarginate 



beneath ; J with the 5th segment beneath rounded 

 at the apex ; calcaria black or piceous. 



(5) 4. ^ with the 5th segment above not toothed at the side ; 

 $ with the apical ventral valve elongate and 

 lanceolate 



(4) 5. (J with the 5th segment above toothed at the sides; 

 2 with the ventral valve shorter and angularly- 

 truncate at the apex . . 



(3) 6. ^ 4th segment of abdomen entire beneath ; J 5th 



segment truncate or emarginate at the apex ; cal- 

 caria pale. 

 (8) 7. ^ with the puncturation of the 4th segment beneath 

 as coarse and scattered as that of the 2nd and 3rd ; 

 2 4th segment beneath largely and remotely jiunc- 

 tured, 6th segment above without a white pilose 

 band 



(7) 8. (^ puncturation of 4th segment beneath distinctly 



finer and closer than that of the 2nd and 3rd ; 2 

 4th segment beneath closely and finely punctured, 

 5th segment above with a white pilose band at the 



vectis. 



4t-clentata. 



rufescens. 



acuminata. 



simplex. 



1. Coelioxys vectis, Curt. (PL VIII., fig. 7). 



Curt., Brit. Ent., viii., p. 349, pi. 349; Smith, Cat. Brit. 

 Hym., 2nd ed., p. 146. 



Black, rugosely punctured ; abdominal segments with triangular 

 lateral spots of white pubescence ; ^ with the 6th segment armed 

 with two sharp basal teeth, its apex bifid and produced into four 

 teeth, the two upper ones short and blunt, and the lower ones long 

 and acute ; 2 with the 6th ventral valve widely lanceolate, simple ; 

 external spur of posterior tibiae blunt in both sexes. 



^. Head very largely and rugosely punctured; face densely 

 clothed with long ochreous hairs ; mandibles bifid. Thorax densely 

 and rugosely punctured, sparingly clothed on the disk and rather 

 densely at the sides, and on the metathorax with pale ochreous 

 hairs ; wings smoky ; scutellum with a blunt spine on each side. 

 Abdomen subconical, deeply and largely punctured, scarcely shin- 

 ing ; puncturation of the 1st segment very close ; 2nd and following 

 segments with a diagonal impression on each side, almost meeting 



