102 [Octobei-, 



AN ESSAY TOWARDS A KNOWLEDGE OF BRITISH HOMOPTERA. 



BY THE BEV. T. A. MABSHALL, M.A. 



(Continued from page 85.) 



Geu. MACBOPSis, Lewis. 

 This and the two following genera constitute a very natural group, 

 distinguished by the great breadth of the head, and narrowness of the 

 vertex, which is reduced to a mere line, when viewed from above. The 

 ocelli are situated about the middle of the frons, equidistant from the 

 vertex and the clypeus. The species are all arboreal in their habits, 

 residing upon oak, willow, poplar, lime, and birch trees. There is only 

 one species of Macropsis found in this country. 



1. — Macropsis lanio, Lin. 

 ? Lacte viridis, vertice, pi'onoto, et scutello vel palHde rufes- 

 centibus, vel rufo-maculatis. Scutellum apice ssepe viride. Pedes 

 virides ; tibiae apice tarsique ccbruleo-virides ; sed illae interdum 

 rufescunt. 3" differt ; totus rufo-testaceus, vel brunneus, vel etiam 

 piceus, hemelytris clarioribus. Long. 3-3| ; alar. exp. 7-7^ lin. 



S Cicada lanio, N.S. 5, p. 464 ; Panz. Fu., 4, 23. 

 lassus lanio, Curt., B.E., pi. 036 (text), No. 1. 

 ^ lassns h'unneus, Fab., Germ., &c. 



Common on oak trees throughout the country. The larvae betray 

 their future sex at an early period, those of the ^ being reddish, while 

 the ? is always pale green. The species is noticed by numerous 

 writers as occurring in most parts of Europe. 



Gen. iDiocEEUS, Lewis. 

 Established in the first volume of the Transactions of the Ento- 

 mological Society, to include those species of which the male * have, 

 near the apex of the antennas, a small, ovate, flattened, black lamina. 

 They agree closely with Macrop>sis in other respects, but the membi'ane 

 of the hemelytra has only four cells. Pediopsis and Macropsis have at 

 least five. I am at present acquainted with only five British species, 

 the discrimination of which is rather difficult. Three or four more 

 may be expected to turn up when the resources of Scotland and 

 Ireland shall have been explored. I am not even sure that I have 

 exhausted the metropolitan district. 



A. Frons et genac lateribus subtiliter pilosae. Hemelytrorum 

 costa in ^ nodulis 0-7 niunita. 



Except the male of I. trenmla; Estl. 





