16 THE CANADIAN ENTOMOLOGIST. 



paddle and forcing the canoe in order to secure this curious spider, 

 imagine my disappointment, just as I was within a yard of it, to see it 

 swallowed by a trout. The day was fine, with just sufficient wind to waft 

 a delicate body of this nature across the lake. My curiosity being aroused, 

 I kept a good look out for another specimen, but no more were seen that 

 day. 



On another lake further north, and during similar weather, I was 

 pleased to witness a number of these in their aeronautic excursions, and 

 on a rock in the centre of the lake was fortunate in capturing a specimen 

 of the spider. In size it is as large as the house spider. The body and 

 legs are densely covered with stiff hair ; its mandibles are long and sharp. 

 It was extremely active, and lived about three weeks in a box after its 

 capture. I am at a loss to account for the mode in which this spider pro- 

 duces the structure with the extraordinary length of attached thread, 

 which it manages to send off in the air. The woods near the lakes are 

 principally pines, which are moss-covered and rugged, and yet, these 

 curious balloons are evidently constructed on trees on the margin of the 

 lakes. 



ON THE GEOGRAPHICAL DISTRIBUTION OF SOME GENERA 



OF CANADIAN INSECTS. 



BY FRANCIS WALKER, LONDON, ENGLAND. 



The following communication includes two genera of Chalcidice, 

 Perilampus, and Callimome. Perilampus is known in America from 

 Canada to Mexico. P. hyalinus Say, inhabits Canada ; P. cyaneus Brulle, 

 and P. Entcllus Walk, are synonyms of it. Say has described two 

 other species, P. platigaster and P. triangularis ; the latter is distinguished 

 from all other species by the dark tips of the wings. P. Aleximis Walk, 

 differs from P. platigaster by not having a brassy tinge, by the luteous 

 tips of the femora, and by the luteous tibiae with a black band. The 

 specimen of P. Leprcos is too much mutilated to ascertain if it agrees 

 with P. platigaster. P. Ziyaliwts, above mentioned, has some resemblance 

 to the European P. violaeeus, but has an elongated scutellum ; in this 

 character it is far exceeded by the Mexican P. gloriosus, which far sur- 

 passes all other known species in size and beauty. P. gloriost/s is also 

 peculiar in the developement of the secondary veins of the forewings 



