Ih'itish Species of llii\'\\}\us. Ill 



ami tlie two accessory lobes (paraiiiores or poripliallic Iobe»<) 

 are alike, and the a'dea^^us itself is dioply cliamicllcd silnni^ 

 its convex side, the "toni;Ui" lying over this nietiiati 

 clijiniiel. On the uppersido of the tongue and along its 

 median line is a distinct ridge, and I imagine that, in the 

 asymmetrical flattening of the whole apparatus in the Ilali- 

 plids, this ridge has become bent over so as to form the li[) of 

 tlie groove which runs along the outer face of this tongue 



In a state of rest tlie ajdeagus w ith its accessory lobes lies 

 on its side within the last abdominal segments, the concavity 

 of the ledeagus being towards the left side of the insect, and 

 the scale-like lobe lies above the jedeagus and the other 

 below. It is diftieult, except by comparison of the armature 

 with other and regular types, such as JIf/drophilus, to realize 

 the orientation of the parts, but by such comj)arison it be- 

 comes evident that the curvature of the ajdeagus has necessi- 

 tated its being varied from its normal position, and that, in a 

 state of rest, it lies upon its left side, the concave edge being 

 the true dorsal side of the organ. When protruded the whole 

 armature turns on its axis through an angle of 1)0°, so that 

 the (.lorsal side becomes ventral and the left accessory lobe 

 lies on the right side ; then, by the bending of the region 

 immediately behind the accessory lobes, the whole armature 

 is bent downwards and forwards, so that tlie dorsal side once 

 njore becomes uppermost as it enters the vagina of the female. 



The Britannic Species. 



J. Jl. apica'is, Thomson, is, I believe, identical with 

 //. striatus, Sharp. 



This species w;is first described in 18G7, and no mention 

 is made of it by Sharp in his description of striatus in 18(39. 

 l*resuniably he did not know Thomson's species. In his 

 tlescription Shaij) remarks the resemblance between his 

 species and JJ.j/uviutilis, and points out that if this latter 

 species is merely a variety of IL riiJicvUis, linn JJ. striaiun la 

 only another variety. Ko one had at tiiat time worked at 

 the lialipliche, so that very little was known about them, 

 iiiul it seems that many subsequent authois have had no 

 knowledge of Sharp's species beyond his description of it, 

 anii have accejited tlie suggestion that it may be a varietal 

 torm. Ganglbauer (7), for instance, disregariling the work 

 of Gerhardt and W ehiicke, includes not only ;ilriuiu.<*, but 

 aUo welmckei and imnKtculiUus, as varieties of ni/icvllis. 

 lit itter (15, p. 204) describes slrialus as an aberration of 



