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Description of some larvae of North American Coleoptera. 

 HY HARON R. OSTKN SACKKN. 



The fourteen larvre described in the sequel belonji,' all (with the excep- 

 tion of Fornax and Epilarhna'), to genera the preparatory states of which 

 have not, to my knowledge, been made known before. The most intei'est- 

 ing among them are PtiJodactyla^ the discovery of which will probably 

 contribute to establish the true location of this genus in the system; Zenoa, 

 belonging to the interesting family of Rln'}>irrriilsp.; Parandra, a genus 

 forming the extreme limit of the extensive family of Lo)igicnrns, and the 

 three unknown larva}, which, after the discovery of their imagos, will add 

 an entirely new form to the system of coleopterous larvae. 



The larvae of Ptiloddcfi/ln, Fornax badius, Parandra, Arltopalus and 

 Centronopus were discovered by Dr. Horn in Philadelphia, to whose kind 

 communication I am indebted for them. 



Zenoa and Prlonori/plion were found by Benj. D. Walsh, Esq., Rock 

 Island, Illinois. 



Coprla rurollmt, FAeiion-ni^ and Ejx'lac/uia were reared by myself. 



Of the three unknown larvae two species were found among alcoholic 

 specimens of coleoptera from the southern parts of this country and the 

 third was discovered by Dr. Horn. 



All the specimens described had been preserved in alcohol. 



COPRIS CAKOLINA Linn. 

 (Plate 1. Fig. ].) 



The larva has the general appearance of all the larvae of LamflUcornx^ 

 only the curved or doubled shape, peculiar to them, is more striking here 

 than in any other, the ventral segments of the abdomen being considerably 

 contracted, whereas the dorsal ones are very convex and distended into a 

 hump-like expansion, through which the contents of the intestinal canal 

 can be seen. 



The length of the larva, if measured along the curved axis of the body, 

 is about two inches; its color, a dirty yellowish-white; the skin is glabrous, 

 except a few scattered hairs. 



Head rounded, brownish-yellow with darker spots; vertex convex, with 

 an impressed line, emitting two, less distinct branches, in the middle; front 

 flattened; epistoma trapezoidal, with an impression each side; lahrum short, 

 transverse, narrowed at the base, bisinuated anteriorly and beset with short, 

 erect bristles; anfcinipr, 4-joiiited, about as long as epistoma and labrum 

 taken toaether, inserted on a tubercle, which mitrht almost be taken for a 



