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CLEVELAND HYMENOPTERA. 



J. W. HESLOP HARRISON, M.Sc. 



In this series of notes it is proposed to put on record various 

 captures made during the past few years in the more northern 

 portions of the Cleveland District. Most of the species 

 recorded below have been taken casually whilst working other 

 groups, and have been worked out subsequently. As the 

 record, in some groups, of such casual captures have reached 

 appalling dimensions, I have finally been forced to prepare 

 the present papers, which are not to be considered to exhaust 

 even the material already worked out. 



* Vespa vulgaris Linn. Common everywhere in the neighbour- 



hood. 

 V. gcrmanica Fab. Although, in many places, even in York- 

 shire, as in the Malton and Castle Howard district, this 

 occurs just as plentifully as V. vulgaris, I have only 

 taken it once here, and that at Newby. 



* V. rufa Linn. Also fairly general, but not nearly as plentiful 



as V. vulgaris. 

 V. austriaca Panz. This is probably the most important record 

 I have to make. I take the hibernated queens every 

 year, towards the end of June, in Lonsdale, in some 

 quantity. This is long after the queens of all the other 

 species are past their prime. These queens are taken as 

 they flit in and out of the bases of the bilberries and the 

 like. It is an extremely important point that V. austriaca 

 is commoner in Lonsdale than V. rufa, on which it is 

 supposed to be solely inquiline. Moreover, I have actually 

 taken a queen investigating a small nest of V. sylvestris 

 suspended from a low pine branch amongst heather. 



* V. sylvestris Scop. About as common as V . rufa, although 



a little commoner on the higher ground. Have seen a 

 nest in a back-yard in the heart of Middlesbrough. 



V . norvegica Fab. With the latter species, but less common. 



Bombus smithiauus White. Pretty common on all the moors. 

 Although it appears to be common enough in the low- 

 lying districts of North Durham, I have never seen it 

 lower than Eston Moor here. 



*B. agrorum Fab. Abundant everywhere and varying tremen- 

 dously in depth of colour. 



*B. hortorum Linn. As with B. agrorum. 



B. laireillellus var. distinguendus Mor. I take this sparingly 

 on Eston Moor ; the type does not occur. 



* Indicates a species captured in Middlesbrough itself. 

 1917 April 1. 



