DELTOCEPHALUB FALLENI. 67 



Deltocephalus ARGUS, Marsh. Plate L., figs. 1 to 16. 



Fieb., Syn. Eur. Delto. fig. 17; Scott; Edw. pt. ii. 

 p. 5Q. 



Upper side pale yellowish brown, with a darker 

 smoky-tinted vertex, pronotum, and scutellum, all of 

 which are nearly spotless. Elytron longer than the 

 abdomen, and ornamented with five or six annular or 

 plain brown spots, and a brown streak at the apex of the 

 clavus ; the apex brown. Abdomen black. Legs pale, 

 smoky, banded, and spotted with black. Male genital 

 plates very small. Caudal process longer than the 

 genital plate, and the structure apparently tubular. 

 The head and pronotum of some specimens are very 

 pale, instead of being smoky-brown and obscurely 

 spotted with black. 



Bare, but widely distributed. Occasionally found in 

 September in the open fields round Haslemere. 



Size, 0*14 inch, or 3*50 millimetres. 



Deltocephalus Falleni, Fieb. Plate L., figs. 2, 2 a. 



Fieb., Syn. Eur. Delto. fig. 24 ; Sahib. ; Scott ; Edw. 

 pt. ii. p. 52. 



Very like D. distinguendus ; but the insect differs in 

 certain characters of the genitalia. " Genital plates 

 in the male reflexed, three times as long as the valve, 

 sinuate on their outer margins, and obtusely rounded 

 at the apices. Side lobes of the pygofer scarcely 

 shorter than the anal tube, but somewhat longer than 

 the plates." "A middle incurved tooth at the apex, 

 and a strong tooth in the middle of the lower margin." 



The above diagnosis is in part from Mr. Edwards' 

 Synopsis. 



This insect has rarely been taken in Britain ; but 



