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USEFUL KEYS TO SOME ECONOMIC FAMILIES OF INSECTS 

 W. Lochhead, Macdonald College. 



SPHINGIDAE.— {Hawk Moths) 



(after Fernald and Smith) 

 Common Genera. 



A. — Tongue long and horny. 



B. — Abdomen with a tuft at tip; diurnal. 

 C. — Middle of wings clear. — Hemaris. 

 CC. — Middle of wings opaque. 



D. — Fore tibia spinose; abdomen not laterally tufted — 



Amphion. 

 DD. — Fore tibia not spinose; abdomen laterally tufted — 

 Thyreiis. 

 BB. — Abdomen not tufted; nocturnal 



C. — Thorax tufted; outer margin of wings obliquely rounded. 

 D. — Eyes strongly ciliated; fore t^bia spinose — Sphinx. 

 DD. — Eyes not ciliated and large; head prominent, palpi 



large — Phlegethontiiis. 

 DDD. — ^Eyes small; palpi small; outer margin excavated 

 — Ceratomia. 

 CC. — Thorax untufted; outer margin of wings more or less 

 excavated. 

 D. — Outer margin of fore wings angulated — Deidamia. 

 DD. — Outer margin entire or sinuous. 



E. — Antennae gradually thickened at tip — Deilephila. 

 EE. — Antennae fusiform and recurved at tip — 



Spurs of middle and hind tibiae long; legs stout 

 — Philampelus. 

 FEE. — Antennae short, not recurved at tip; wings 

 more sinuate; head more retracted — Ampe- 

 lophaga. 

 AA.— Tongue short and membranous. 



B. — Outer margin of fore wings entire and evenly rounded — Ellema. 

 C. — Fore tibiae with a stout spine at tip — Triptogon. 

 CC. — All the tibiae spinose — Cressonia. 

 CCC. — Tibiae not spinose; hind wings with an eye spot. 

 D. — Outer margin of fore wings scalloped — Paonias. 

 DD. — Outer margin more or less angulated — Smerinthus. 



