40 Mr. F. Walker on some new species of Chalcidites. 



of the chest ; a rim on the hind-border of the shield ; scutcheon 

 nearly truncate-conical, convex behind, divided into two parts by a 

 slight transverse ridge, which formation in the Chalcidites is a cha- 

 racter of the development of that segment ; the scutcheon is rugulose, 

 coarsely so round the border, but the inequalities diminish in size 

 towards the middle where the sculpture is minute and beautiful : the 

 hind-chest is rather large, nearly obconical, declining ; it is divided 

 into three compartments by a transverse ridge which forms in the 

 middle an angle joining the fore-border ; the fore-compartments are 

 short, and have each about six regular longitudinal ridges ; the hind- 

 compartment is longer and its ridges are more irregular, and it is 

 subdivided by two slight furrows, and in the space between them 

 there are two or three little transverse ridges : petiole extremely 

 short : abdomen convex, spindle-shaped, smooth, shining, tawny, a 

 little shorter and broader than the chest ; sides yellow ; metapodeon 

 truncate-conical, concave towards the fore-border where it has three 

 brown spots ; the middle spot is heart-shaped, the side spots are tri- 

 angular : along the back of the abdomen there is a brown stripe irre- 

 gular in outline, and divided by the variations of its breadth into 

 three parts ; the first is cup-shaped, the second is nearly round, the 

 third is spindle-shaped ; the octoon is broad on each side, narrow in 

 the middle of the back where a fissure divides it into two parts ; it 

 is free, or is not anchylosed with the following segment, which 

 arrangement, a character of the Torymidce, enables the abdomen to 

 enjoy more freedom of motion for its functions, and to direct the 

 movements of the ovipositor ; ennaton, decaton and protelum large 

 and of nearly equal size ; paratelum and telum very short : sheaths of 

 the ovipositor black, pubescent, as long as the body : legs yellow ; 

 hind hips tawny, brown at the base, much longer than the rest ; 

 thighs furnished with rows of white hairs ; knees tawny ; shanks 

 pubescent ; fore-shanks a little darker than the rest ; fore-feet tawny ; 

 the peculiar dark colour of the fore-feet is very general among the 

 Chalcidites ; tips of the feet brown : wings with a very slight tawny 

 tinge ; veins dark brown, tawny towards the base of the wing ; hu- 

 merus beset with bristles towards its base, joining the fore-border by 

 a very gentle curve ; before this communication it sends forth a short 

 slender curved tawny vein that descends into the disc of the wing ; it 

 is darker towards its tip, where it is traversed by a tawny stripe whose 

 course is marked by a line of hairs ; the ulna is about one-third of the 

 length of the humerus ; the radius is more than twice the length of 

 the ulna ; the cubitus is not more than one-fourth of the length of 

 the ulna ; the brand is large, oblong, emitting a short branch inclosed 

 in a brown spot which is continued along the sides of the cubitus : 

 the vein of the hind-wing after sinking below the fore-border during 

 part of its course again joins it at its tip where it is furnished with 

 the little hooks by which the fore-wings are attached to the hind- 

 wings : the wings are pubescent, except at the base, where there are 

 hardly any hairs. This species is distinguished from M. dorsalis by 

 its larger size, its longer ulna and shorter radius, and by some slight 

 differences in sculpture and colour. 

 South of Europe. 



