172 THE CANADIAN ENTOMOLOGIST. 



longer than the second posterior cell, its stem less than half the length of 



the cell ; stem of the second posterior as long as the cell ; posterior cross 



vein more than its own length behind the mid cross vein. Halteres with 



white stems and brown knobs. Abdomen black-scaled, with violet 



reflections ; first four segments with basal bands of golden scales ; all 



segments apically bordered with long white hairs. Triangular patches of 

 silvery scales on the sides of the segments extending ventrally a short 

 distance. Venter with broad basal bands of golden scales on all the 

 segments except the last two. Legs black, with violet reflections, speckled 

 with golden scales, especially towards the extremities ; femora golden- 

 scaled on the under surface throughout their whole length, upper surface 

 golden-scaled near the base, a few silvery scales at the apices above 

 forming three spots, especially on the mid and hind legs. Tibi?e 

 unhanded in all the legs. A narrow white basal band on the mid 

 metatarsus. Broad basal bands of silvery-white scales on the metatarsus 

 and first two tarsi of the hind legs. Ungues equal and simple. 



Length, 2.5 mm. 



^ . — Palpi black, very long and narrow, extending about one-quarter 

 of their length beyond proboscis; three long black hairs at the extremities 

 of the terminal joints ; a few on the sides of the penultimate and at the 

 extreme apices of the antepenultimate joints ; a few golden scales at the 

 junction of the terminal and penultimate joints; a conspicuous band of 

 golden scales at the lower third of the antepenultimate joint. Shaft of the 

 antennae conspicuously golden-scaled. The median band of gold scales 

 on the occi])Ut is divided into two by a line of black scales. Abdomen 

 black, segments with long white hairs along the apical borders ; all 

 segments with silvery lateral areas ; in the last three segments these nearly 

 meet dorsally, forming basal bands. Venter with broad basal bands of 

 silvery scales, among which are a few golden scales along the mid line. 

 Ungues, of the fore leg, unequal, larger biserrated, smaller uniserrated ; of 

 the mid leg larger biserrated, smaller uniserrate ; of the hind leg simple 

 and equal. 



Length, 2.5 mm. 



Description of the adult larva. — Seen in the breeding jar, it has an 

 almost transparent outline ; the head and siphon of a dull red colour. 

 When disturbed it displayed mark,ed activity, retreating with great speed 

 to the dark side of the bottle, and hiding among the algoe. Head nearly 



