1888.] 21 



14 (15) Pleura with reddish-brown markings analis, Schum. 



15 (14) Pleurae with blackish markings. 



16 (17) Occipital black spot elongate guestfalica, Westh. 



17 (16) Occipital black spot nearly equilateral, the two sides being scarcely longer 



than the base cornicina, L. 



18 (5) Abdomen without any dorsal line . annulicornis, Mg. 



P. imperialis, Mg. : an elegant species, which I have taken in 

 this honse in April, and not uncommonly at the end of August near 

 Tunbridge Wells ; Mr. Gr. C. Bignell has taken it near Plymouth. 



P. scurra, Mg. : tolerably common in August about Barton in 

 Suffolk ; it is very distinct from the other Pachyrrhinw, though very 

 like Nephrotoma dorsalis, from which the different antennae dis- 

 tinguish it. 



P. maculosa, Mg. : this species was mixed up with the next by 

 Walker, but is a perfectly distinct, darker insect. It is not uncom- 

 mon about road-sides. 



P. histrio, F., is very abundant in my garden. 



P. quadrifaria, Mg. : not uncommon, and very widely distributed 

 in England, but I have not seen it from Scotland. Though this and 

 the next three species seem very much alike from descriptions, they 

 are quite distinct species, with numerous constant small characters, 

 which would take up too much space for this paper. 



P. analis, Schum. : I have one very fine specimen from Lynd- 

 hurst, June 18th, 1885 ; it is the only recorded British specimen. 

 The species is a little smaller than P. quadrifaria, but larger than the 

 next two. 



P. guestfalica, Westh. : this was first distinguished by Westhoff, 

 in J.-B., Zool. Sect. Westf. Yer., viii, 51 (1879), and is there well 

 described and figured. It appears to be a garden species, and is fairly 

 common in my garden, but not so abundant as P. histrio. It is the 

 smallest British species, the abdomen being shorter and thicker than 

 in P. cornicina, L. The earliest date I have for it is Dickleburgh, 

 June 26th, and the latest, Lyndhurst, July 14th. 



P. cornicina, L., often described as P. iridicolor, Schum., occurs 

 in various places near here, but never in company with P. guestfalica. 



It is not at all improbable that two or three more PacJiyrrhince 

 may occur in England, the most probable being P. jpratensis, L., 

 which is one of the commonest European species ; it is well dis- 

 tinguished by the yellow or whitish side-spots on the abdomen. 



