A HISTORY OF ESSEX 



Colchester 



LIMNOPHILID^ (continued) 



Limnophilus fuscicornis, Ramb. Ded- 



ham 

 Anabolia, Steph. 



nervosa (Leach) Curt. Colchester 

 Stenophylax, Kol. 



stellatus, Curt. \ 



concentricus, Zett. J 

 Micropterna, Stein. 



sequax, McLach. Colchester 

 Halesus, Steph. 



digitatus, Schrank. Colchester 

 Chsetopteryx, Steph. 



villosa, Fab. Colchester 

 SERICOSTOMATID.S: 



Sericostoma, Latr. 



personatum, Spence. Colchester 

 Notidobia, Steph. 



ciliaris, L. Colchester 

 LEPTOCERID^ 



Molanna, Curt. 



LEPTOCERID^; (continued) 



Molanna angustata, Curt. Colchester 

 Leptocerus, Leach 



senilis, Burm. "1 



cinereus, Curt. J 

 Mystacides, Latr. 



- lng'cornis, L. } ^^ 



azurea, L. J 

 HYDROPSYCHID^ 



Hydropsyche, Pict. 



instabilis, Curt. \ 



angustipennis, Curt. J 

 Polycentropus, Curt. 



flavo-maculatus, Pict. Colchester 

 Cyrnus, Steph. 



trimaculatus, Curt. 

 Tinodes, Leach. 



waeneri, L. 



R.HYACOPHIUD.ffi 



Agapetus, Curt. 



fuscipes, Curt. 



Colchester 



Colchester 



HYMENOPTERA 

 ACULEATA 



The order Hymenoptera is an extensive one, consisting of insects 

 which as a rule have four membranous wings, though certain among 

 them are wingless. In the Aculeate section, which comprises ants, sand 

 wasps, wasps and bees, the female is provided with a sting, which, being 

 connected with a poison bag, constitutes a formidable weapon of offence 

 or defence. The solitary species consist of fully developed males and 

 females only, but in the social species ants, hive bees and humble bees 

 there are also undeveloped females, known, and very fittingly known, 

 as workers, on whose labour depends the welfare of the community. 



In recent years, owing principally to the admirable work which has 

 been done in them by Mr. Edward Saunders, these insects have received 

 more attention than was accorded to them formerly, and as a conse- 

 quence their local distribution is much more fully understood and addi- 

 tional species are being frequently added to our list. 



The late Mr. Frederick Smith, author of A Catalogue of British Bees 

 in the British Museum, occasionally collected at Southend, and more re- 

 cently the Colchester district has been pretty well worked, though it is 

 probable that additional species will for a long time result from further 

 investigation, for while some are excessively local or very erratic in their 

 appearances, others more given to wandering are constantly on the look 

 out for suitable places in which to found fresh colonies ; and seeing that 

 their habitations are constantly liable to adverse influences either by the 

 dense growth of vegetation, the ravages of mankind, or other causes, the 

 Aculeate fauna of a particular district may be materially modified in the 

 course of a few years. 



Where no locality is given in the list that follows the Colchester 

 district is to be understood, and this includes not only the neighbourhood 



98 



