3. CHRYSOPS 431 



segment, and slightly so on the sides and hindmargins of the fourth and fifth 

 segments, but dull greyish black on the rest ; pubescence short, recumbent, 

 and golden orange, with usually distinct short fringes on the hindmargins. 



Legs almost as in the male, but with the base of the front tibiae rather 

 obscurely luteous, and the hind tibiae wholly luteous though not so pale as the 

 middle pair; middle femora obviously reddish at the tip to a greater or 

 less degree. 



Wings with the blackened markings almost as in C. ccecutiens, but the pale 

 space between the basal and middle bands wider, the dark basal band 

 only extending to the base of the upper and middle basal cells and the hind- 

 margin much less blackened, while the boundary of the apical band is less 

 distinct and the hyaline space above the cubital fork is less defined. Squamae 

 rather paler than in C. ccecutiens. 



Length about 9 mm. 



This species has been closely contrasted with C. ccecutiens, from which 

 the ferruginous middle tibise of the male and posterior tibife of the female 

 readily distinguish it ; G. rclicta is in many ways very closely allied, but the 

 male of C. quaclrata has black pubescence on the pleurae and on the sides 

 of the two basal abdominal segments, as well as the hind tibise black 

 and the orange abdominal markings more restricted. The female of G. quad- 

 rata may always be known by the small isolated black spot on the orange 

 base of the abdomen ; it varies a good deal in the amount of reddish colora- 

 tion at the tip of the middle femora, which may either be almost imperceptible 

 or may extend to a third or even almost a half of the femora ; the antennae 

 often have all the basal joint except its tip orange or reddish, and the 

 third joint reddish orange soon after its base, and even the underside 

 of the second joint reddish orange; palpi often reddish brown. G. 

 quadrata is shghtly smaller than G. caxuticns and G. rclicta. G. rufi^KS, 

 which is almost certain to occur in Britain, has the legs much more 

 extensively red, as all the tibiae in both sexes and the femora to a large 

 extent in the female are reddish orange, while the basal joint of the antennae 

 is more thickened. 



G. quadrata is not nearly so common in England as G. caruticns and 

 G. rclicta, but yet is widely spread over the southern and midland counties. 

 I have records from Devonshire (Holne on Dartmoor), Dorset (Canford 

 Common and Studland), Hampshire (Lyndhurst, Lymington, Bourne- 

 mouth, and not uncommon in some parts of the New Forest), Sussex 

 (Abbotts Wood and Guestling), Cambridgeshire (Wicken Fen, and not 

 uncommon in Chippenham Fen), Warwickshire (Sutton Park), and 

 Glamorgan (Porthcawl), while Col. Yerbury took it at Avieraore in Inver- 

 ness in July 1899; it was first recorded as British by Duncan in 

 1837 under the name of G.jncti/s Meig. as having been taken by "Charles 

 " C. Babington, Esq.," at " Monkswood, Hunts, June 23, 1829," but Walker 

 ignored it. My captures range from June 7 to September 1. It is 

 recorded from almost all Europe. 



3. C. relicta Meigen. Posterior tibiae orange in both sexes. Abdomen 



with conspicuous yellow markings at the sides of the two basal segments 



(6), or with the second segment yellow with a pair of black lobes (?). 



cJ . Face mainly covered with dull yellowish dust ; the two shining black facial 

 calli nearly circular and indistinctly split by a longitudinal furrow into a 

 larger inner and a smaller outer part, usually well isolated but occasionally 

 united by a narrow line to the two small shining black upright narrow oral 

 calli which are placed just above each side of the upper mouth-edge; buccal 



