SOME FURTHER NOTES ON NOCTURNAL HYMENOPTERA 87 



Vespa ; and, as its name implies, it has a great resemblance to 

 the winged forms of the ant genus Dorylus. In the "Journal 

 of the Linnean Society," 1859, p. 297, Dr. A. R. Wallace 

 describes it as " a curious species of weak structure and 

 nocturnal habits, since I only took it when attracted to the 

 lamp at night." According to Du Buysson this species lives 

 in old, thickly planted forests, and appears to be greatly incon- 

 venienced by sunlight, and is only active at night. 1 From 

 its form and colouration Vespa barthelemyi, Duy., has 

 probably identical habits. The South American social 

 wasp, Apoica, flies during the night collecting honey, and 

 resting in its nest during the day, as observed by Fritz 

 Miiller and Mr. Adolf Ducke. In its body form it is more 

 elongated than usual and has very prominent ocelli. A 

 comparison of Apoica virginea, F., Vespa dorylloides, and the 

 ant Dorylus shows great resemblance in body form, pilosity, 

 and colouration, showing, as I believe, that their general 

 resemblance has been produced by the habit, common to 

 them all, of being active at night, and not, like their 

 congeners, during the day. Among the Mutillidte the 

 genus Photopsis is certainly crepuscular. This genus is 

 well represented in the south and south-west of the United 

 States and in Mexico, the males flying about at night. All 

 the species are very hairy, brownish in colour and have 

 prominent ocelli. 



SCOTTISH PHORID^, WITH TABLES OF ALL 

 THE BRITISH SPECIES, AND NOTES OF 

 LOCALITIES 



By J. R. MALLOCH. 

 ( Continued from p. 21.) 



PHORA, Latr. 



Generic description : Antennae sometimes enlarged, arista dorsal ; 

 frontal bristles as in Spiniphora ; mid tibiae with two bristles at near 

 the base, and a very small subapical bristle on the outer side ; hind 

 tibise with an outer hind marginal row of small bristles in addition 



i 



Ann. cle la Soc. Ent. de France," 1904, p. 617. 



