DimnUIX.] ADEniACA, 1-il 



1. Elytra wiMi a row of pores on both the 3rd and 



7th interstices D. AOTLTS, F. 



2. Elytra with a row of pores on the 7th interstice 



only ; . . . . D. MERIDIONALIS, BeJ. 



ii. Elytra more or less testaceons. 



1. Anterior testaceous markings of elytra not 



reaching- side margins. 



A. Thorax plainly broader than long; front of 



head entirely striated D. QTTADEIMACULATFS, L. 



B. Thorax plainly longer than broad ; front of 



head smooth in centre D. quadrjnotatC3, Fanz. 



2. Anterior testaceous markings of elytra reaching 



side margins. 



A. Head strongly contracted behind eyes; an- 

 teunfB with joints 5-10 short ; thorax broader 



than long D. QUadeisignatus, Bej. 



B. Head gradually contracted behind eyes ; an- 

 tennae with joints 3-10 elongate ; thorax at 



least as long as broad. 



a. Elytra entirely testaceous ; shoulders marked D. iiELAXOCEPHALrs, 2)(y'. 



b. Elytra testaceous with a more or less de- 



fined dark band ; shouMers rounded, 

 a*. Thorax and elytra narrower. 



af. TliorMx iind alKlomen pitch-black ; 



dark markings on elytra ill-detined . . D. NIGEITENTEI3, Thorns. 

 bf. Thorax and abdonnu yellow or reddish 

 yellow ; dark markings on elytra well 



defined D. SIGIIA, Rossi. 



b*. Thorax and elytra broader ; underside of 



abdomen and disc of thorax usually pitchy. D. tectensis, Rye. 



1>. long-iceps, Dej. Elongate, very like a Demetrias ; head long 

 and narrow, pitch-brown, anteniiie and palpi reddish testaceous, base of 

 the former lighter ; thorax longer than broad, with sides narrowed behmd, 

 and margins elevated, posterior angles obtuse, almost rounded ; elytra 

 long, narrow, somewhat widened behind middle, feelily striated, testaceous, 

 with suture, and a spot behind middle into which the suture widens, 

 fuscous ; legs testaceous. L. 6-6i mm. 



Rare ; confined to marshy and fenny localities ; Horning Fen, Holme Fen, and 

 Whittlesea Mere, and other localities in the eastern fen districts; among reeds and 

 sedges l)oth standing and cut ; found like other fen insects in the sedge boats on the 

 river Cam. 



This species differs so much from the other Dromii in general appear- 

 ance, and also in the fact that the paraglossas are united over the front of 

 the liugua, forming a membranous rim round that organ, that it almost 

 seems to form the type of a new genus, for which I would propose the 

 name of Paradroiaius ; I would not, however, venture to adopt it linally 

 without a further examination of the genus. 



D. linearis, 01. Easily distinguished by its elongate narrow form 

 and almost parallel-sided elytra ; dark testaceous red, head pitchy red, 

 antenucB testaceous ; thorax only slightly longer than head, and about 

 the same breadth at its widest part, narrowed behind, posterior angles 



