British Ilomopteni-Cicadina. o7 



A. Minki, Fieb., Grimdz. Delph., 522, 1. 



Ddjjhax MinJd, J. SabL, Not. Fenn., xii., 401, 2. 



D. pulchella, Scott, Ent. Mo. Mag., vii., 24, 2. 



ArcBopus pidchellus, Fieb., Cicad. d'Eur., pt. iii., 6, 2. 



Crown nearly square. Pronotum ami scutellum pale, narrowly 

 brown at the sides. Elytra pale yellowish, with a stripe just above 

 the claval sutiu'e, a broad curved stripe occupying about the lower 

 half of the membrane, and a line along the nerve dividing the 2nd 

 and 3rd apical areas, dark brown. Legs pale, tarsi of the fe'ont 

 pairs and claw-joint of the hind pair dark brown. Abdomen above 

 black, its base, the sides narrowly, and a narrow dorsal line 

 brownish yellow. 



? . Generally brachypterous ; elytra half as long as the abdo- 

 men, yellowish without dark markings. Length, 5;^ — (J mm. 



Marsbes ; not uncommon. 



iii. LiBURNiA, Stal. (PL I., fig. 19). 

 Stal, Hem. Afr., iv., 179 (186G). 



A somewbat numerous group of small spacies, tbe 

 members of wbicb agree in having but one more or less 

 distinct central facial keel, wbicb is never forked for balf 

 its lengtb, altbougb sometimes divided on tbe forebead. 



Several well-defined minor groups migbt be eliminated, 

 but there seems to be no advantage in giving to these 

 sections distinctive names. Some of tbe species are so 

 excessively similar in appearance that they can only be 

 satisfactorily separated by tbe characters afforded by tbe 

 male genital armature, and in most cases the time 

 bestowed in attempting to identify females of this genus 

 would be better employed in endeavouring to discover 

 and ca^jture their respective males. In comparing 

 specimens with Fieber's figures ('Grundziige zur gener- 

 iscben Tbeilung der Delpbacini,' Taf. viii.) it is important 

 to bear in mind that in bis fig. d, " Aftertriiger von 

 hinten gescben," tbe point of view is such that tbe base 

 of the styles are visible, because a trifling alteration in 

 the point of view will give rise to a considerable difference 

 in tbe appearance of tbe parts ; characters derived from 

 tbe form of tbe styles are much more reliable, but in 

 many instances it is almost impossible to understand 

 their correct form without dissecting them out, a course 

 which should always be resorted to in doubtful cases. 



TRANS. ENT. SOC. LOND. 1886. PART II. (jUNE.) ¥ 



