1866.] ;^79 



(^. Testaceus, nigro-varius. Nigra sunt — abdomen supra plus 

 minus ; fasciae verticis, una apicalis, altera basalis quater emarginata, 

 linea tenuissima inter se conjunctae : genarum macula sub antennis : 

 frontis inferioris litura media : pronoti fascia transversa antica : scutelli 

 maculae 3 basales, una apicalis, (sed lise variant) : bemelytrorum spatia 

 inter nerves, nervis ipsis albentibus. Corii striae 4 nigrse ante apicem 

 in maculam magnam concurrunt ; apex ipse albus. Pedes testacei ; 

 tibiae anticse apice, posticae fere totae, cum femorum macula apicali, nigrae. 



? . Plavo-brunneus, vertice quam apud (J longiore. Caput, pro- 

 notum, scutellum, plus minus nigro irregulariter maculata. Hemeljtra 

 apice angustiora quam in J ; cum nervis ipsis pallida, fusco-testacea, 

 atomis nigris inter nervos intersitis, unde discus striatus apparet. Alae 

 alis masculis ampl lores. 



Var. a. Pallidus, testaceus, hemelytris concoloribus. 



Long, li cJ; li-2 1in. ?. 



jj. lassus rivularis, Germ., Mag., 4, p. 89. ApJirodes, Curt. 



B. E., 633, No. 3. 



$ ? . Acoceph. rivularis, Flor, R. L., 2, p. 205. 



The typical females of tbis and the preceding are sufficiently 

 distinct, but for tbe pallid varieties it is not easy to propose a ready 

 method of division. The $ of rivularis is a little smaller and shorter, 

 tbe hemelytra being not longer than the abdomen (unless this is full of 

 ^ggs)- It has most commonly a blackish spot on the genae, beneath 

 the base of the antennae, which is wanting in alhifrons. The pale 

 varieties of albifrons commonly offer traces of spots upon the apex of 

 the costal nervure itself, but the costal nervure of rivularis is always 

 pale and spotless, even in the dark varieties. Common in the same 

 situations as the preceding, but I have never met with it in the London 

 district. 



ft Vertex pronoto quarta fere parte brevier. 



* Hemelytra longitrorsum regulariter nigro striata. 



5. — AcocepJialus Jiistrionicus, Pab. 

 ^ . Niger ; caput et pronotum testacea, nigro varia. Hemelytra 

 hyalina, albida, nervis nigricantibus. Vertex brevis, dimidia sua inter 

 oculos latitudine brevior, basi niger, lineam e medio apicem versus 

 nigi'am emittens, quae in fasciam maculosam ibi desinit. Pronotum 

 antice fascia transversa nigra, basi etiam anguste nigrum. Scutellum 

 nigrum. Hemelytrorum nervus costalis testaceus, coeteri nigricantes, 

 tenues, in fasciam apicalem nigram ante membranam decurrentes. 

 Pedes testacei, tarsis nigris ; tibiae nigro lineatae, anticae etiam apice, 

 posticae fere totae, nigrse. 



