z8 REV. J E. HULL ON 



38a. Belaustium vittatum, sp. nov. 1,900 /jl (width 

 740 jx.) 66. 



Elongate ; red with a median yellow stripe com- 

 mencing behind the shoulders and expanding a 

 little at the posterior margin. There is a slight 

 constriction of the body about the middle. Crista 

 linear not prominent in front. Dorsal spines short 

 but spiny, not very dense. (Fig. 60). 



Durham (Easington, R. S. B.) 



ACHOROLOPHUS, Berl. 



Eyes 2. Body more or less ellipsoid, without post- 

 thoracic furrow. Dorsal setae usually spinous, 

 short, simple. Anterior sensillar area prominent, 

 very strongly spinose with straight long spines. 



Type : globiger, Berl. 



1. Front sensillar area globose ... ... .. ... globiger. 



„ not globose ... ... ... 2 



2. Crista in a chitinous plate as wide as sensillar area ... norvegiais. 

 Chitinous plate of crista much narrower ... ... porcimis. 



39. Achorolophus globiger, Berl. 2.2 mm. 67. 



The globose knob on the prodorsal margin is very 

 conspicuous. Pubescence spiny. 



Yorkshire, Cumberland. Not common. 



40. Achorolophus norvegicus, S. Thor. 2 mm. 67. 



Rhyncholophus mantonensis., Geo. 



The broad chitinous channel in which the crista lies 



distinguishes this species at once. 

 Cheshire, Yorkshire, North Wales (Flintshire). 



41. Achorolophus porcinus, sp. nov. 3.3 mm. 68. 



Elongate (breadth 1.5 mm.) Pale red. Pubescence 

 short and fine, hardly spiny. Length of fore leg 

 2.8 mm., its tarsus rectangular 380 yu, long, pen- 

 ultimate joint 520 /x. (Fig. 48). 



A single example in Newham bog, Northumberland. 



