1S8G.I _ 43 



Ist. The impressions on tlie vertex, as observed by Wesmael, are each divided 

 diagonally by a raised line, but I do not fancy that this character is a very reliable 

 one, as in some specimens of dimldiatus the origin of such a line can be distinctly 

 traced. 



2nd. The posterior tibise are more rounded and less spinose : in dimidiatus 

 there is a sort of crest down the centre of the tibia, from which some of the spines 

 seem to spring ; this is much less developed or nearly obsolete in signaUis, and the 

 tibiae are not marked with black. 



3rd. The basal segment of the abdomen is shorter, and its sides converge more 

 rapidly to the base, and so make the waist shorter. 



4th. And what seems to me to be the most important character of all, the 

 meta-thorax is shorter, and slopes more abruptly down to the point of junction with 

 the abdomen ; it is this character, easily perceived if the insects are examined side- 

 ways, which, I believe, gives to signatiis $ its peculiar shape. 



I fancy that signatus ? is very probably mixed in collections with dimidiatus, 

 and that it would be discovered in many localities if its distinguishing features were 

 better known. — -Id. : June 14^/i, 1886. 



Scottish Hemiptera. — Since the death of Mr. George Norman in 1882, no one 

 appears to have collected Hemiptera in Scotland, and yet there is reason to believe 

 that his somewhat desultory though continued attention to this Order, producing as 

 it did a good many rare species, did not exhaust the novelties, and that there yet 

 remain a number of species that are desiderata, even of those that have been found 

 sparsely. Surely among the Scottish entomologists there ai*e some that without any 

 special search find Hemiptera it would be very easy to bottle for their friends, if they 

 did not keep them for themselves ; this latter, however, if they once began to get 

 them would, I hope, happen. There are a good many species that are mostly or 

 only found in the North ; I mention a few of them, but otliers not now known as 

 boreal will be sure to occur, for it is the unexpected that mostly happens. 



Heteropteea. 



Clinocoris griseus, Linn. {cf. vol. xxii, p. 37), on birches. 



Phytocoris piiii, Kbm., Scotch fir, August. 



Derceocoris alpestris, Fieb., woods, July. 



Orthotylus jlavinervis, Kbm., on Wych elm {Ulmus montana), July and August. 



Conostethus brevis, Reut., saline places, August. 



Plesiodema pinetellum, Zett., Scotch fir, June. 



Agalliastes Wilkinsoni, D. & S., moss in grass in woods, May, June. 



Bothynotus pilosus, Boh., on moors 1500 feet up. 



Temnostethus nigricornis, Zett., Scotch fir, June. 



Acompocoris alpinus, Reut., firs, June. 



Salda morio, Zett. ; scotica,C\i.vt. ; conspicua, D. & S., on elevated moors, June, July. 



Corixa venusta, D. & S. ; socia, D. & S. ; sodalis, D. & S. ; vernicosa, Walleng. ; 

 variegata, Wall. ; cavifrons, Thoms. ; in mountain lochs and streams, August 

 and September. 



C Boldi, distinguished from all others by the markings on the clavus being longitu- 

 dinal instead of transverse, it is very desirable to obtain if possible. It is known 

 only by a single example taken in the North of England. 



