1915.] 207 



Deltocejihalus multinotatus Boli. 



Having regard to the six dark spots on the crown, two (triangular) at the 

 apex, two (transverse) in a line with the front edge of the eye, and two (trans- 

 verse) at the hind margin, and the blackish spot on the elytra at the end of 

 cell M 3, this cannot be mistaken for any other British species of the genus. 

 The veins are in greater part milk-white, and veins El and R2 + 3 each stand 

 in a milk-white triangular spot. The pronotum has a dusky cloud on the disk 

 and a black point on each side. The aedeagus (fig. 5) is long, strap-shaped, of 

 three divisions, of which the two outer are more highly chitinised than the 

 inner one ; at about the apical fifth each lateral portion is produced outwardly 

 into a recurved tooth, beyond which the remainder of the organ is bent over, 

 in form somewhat like the lip of a jug ; the bases of these two teeth are 

 connected by an arch ; on the front side opposite to this arch there are two 

 long, straight, divergent spines, of which about the apical third is visible in the 

 cephalad aspect. 



I have called this species muHinotatvs Boh., in accordance with 

 coiuiuou usage ; but I can only say with certainty that it is multi- 

 notatus Then (Mitt. Nat. Ver. Steierniark, 1898, t. II). It is evident 

 from the latter's foot-note, t.c. p. 161, that he includes more than one 

 Austrian species under that name, though he only figures the genitalia 

 of our insect. 



The macropterous form, of which I have only seen the female, is 

 a most beautiful insect ; the dark markings on the crown and pro- 

 notum are exaggerated, and the cells of the elytra are nearly all 

 margined with blackish, the white markings becoming by contrast 

 much more conspicuous. 



Notts (Carr) ; N. E. Yorkshire {Butler). 



Deltocephalus sursumflexus Then. 



Similar in general appearance to D. flori Fieb., bixt the tendency to have 

 black margins to the cells is less marked. The aedeagvis (fig. 7) is long and 

 slender, and on each side of the pointed apex there is a long curved horn 

 directed oiitward and downward in the plane of the long axis of the stem ; in 

 the lateral aspect one sees at the apex an ii-regularly roundish membranous 

 lobe, the distal end of which is strongly chitinised. The tooth on the distal 

 third of the lower edge of the pygofer is small, straight, and not curved inward. 

 The difference in the outline of the hind margin of the last ventral segment in 

 the female does not furnish any reliable distinction between this species 

 and D. fiori. 



I got D. siirsumflexus from the herbage (rushes, sedges, Vaccinium, 

 Sphagnum, &c.), at the edge of pools in the Delamere Forest district, 

 at the end of August, 1914 ; it occurred much more sparingly than is 

 usual with the Deltocephali. 



