356 APPENDIX. 



cond and third segments each with a band on their poste- 

 rior margins, pale yellow ; remaining bands indistinct. 



Length from three-tenths to nearly seven-twentieths of 

 an inch. 



Much smaller than the preceding, and about equal in size 

 to E. mercatus, Fabr. from which it differs by various 

 characters, and particularly by the much more dilated form 

 of the posterior thoracic teeth. During rainy or windy wea- 

 ther, this insect secures itself to the edge of a leaf or to 

 the small branch of a bush, by its mandibles, retracts the 

 feet to the body, and projects the antennae forwards. 



ORDER DIPTERA. 



ANOPHELES, Meig. Wied. 



A. A-viaculatus. Pale brownish ; wings with four fus- 

 cous spots. 



Inhabits North-west Territory. 



Thorax dull cinereous ; two oblique, brown lines con- 

 fluent behind and reaching the posterior edge ; a broad, la- 

 teral, brown line also extending the whole length of the 

 thorax ; wings hyaline, the nervures hairy, forming two 

 blackish spots near the middle, placed longitudinally ; and 

 two others nearer the tip on the bifurcations of the ner- 

 vures, placed transversely; scutel dull ochreous, dusky 

 in the middle ; feet black-brown, incisures at tip of the 

 thighs and of the tibiae, yellowish ; tergum whitish, a lit- 

 tle varied with dusky. 



Length 9 to the tip of the wings more than three-tenths 

 of an inch. 



