240 MACHILIS. 



Machilis variabilis, Say. 



Macliilis variahilis, Say. Jour. Acad. Philadelphia, 1821. 



— — Lucas. His. Nat. des Crus. Ar. et Myr. 



— — Gervais. His. Ins. Apt. 



— — Nic. Ann. Soc. Ent. France, 1847, 



Superior caudal process more tlian double tlie lengtli 

 of the others ; false feet bisetous at tip ; colour 

 cinereous or iridescent varied with black. 



" Inhabits North America. 



" Cabinet of the Academy. 



" Body above cinereous, somewhat iridescent, varied 

 with black ; gibbous portion of the body not differently 

 coloured ; a more or less whitish vitta ; false feet white, 

 hirsute, setaceous at tip, superior caudal process more 

 than double the length of the inferior ones. 



" Var. a. Body above unicolour, destitute of the white 

 dorsal vitta. 



" Yar. h. Body ferruginous, with dusky lateral 

 spots. 



" Var. c. Body with several snowy spots each side. 



" A common insect in many humid places, probably 

 in almost every temperate part of North America. 

 We observed it as far south as East Florida. It is 

 subject to a great many variations." 



Macliilis gig as, Burmeister. 



Macliilis gigas, Bur. Hand, d. Ent. 



— — ■ Gervais. His. Ins. Apt. 



— — Nic. Ann. Soc. Ent. France, 1847. 



Ginereo-argentea, purpureo micans ; squamulis fascis 

 intermixtis ; palpis concoloribus setosis ; vagina pallida, 

 fusca multo lougior. 



Long. Corp. 5^'" 



Syria. 



