l68 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, III 



by W. J. Brown, of Ottawa. Both specimens were collected at the 

 same time and in the same woods, but from separate decayed logs. 



2; Baldwin Hill, Douglas County, Kans. ; Jan. 3, 1933; i reared to an adult 

 June 4, 1933 ; C. H. Hoffman. (C.N.C.) 



Genus LEPTUROIDES Herbst 

 Figures 12, b; 33, c-e 



In following Hyslop (1921), the generic name Lepturoides Herbst 

 is used in preference to Campylus Fischer and Denticollis Filler and 

 Mitterspacher, which are still commonly used by European workers. 



Larvae of this genus are known for the European genotype, Lep- 

 turoides linearis (Linnaeus), and for the North American denticornis 

 (Kirby), and a closely allied but unidentified larva from Alaska, 

 which possibly is fulvtts (Motschulsky). These larvae are very simi- 

 lar and further study and more material are required to secure reliable 

 separating structural characters. 



All known Lepturoides larvae inhabit the forest, usually occurring 

 under the bark of decaying wood, especially in stumps and logs 

 of deciduous trees. They are believed to be predaceous. Henriksen 

 (191 1, p. 269) states that L. linearis pupates in May and June, the 

 newly formed adults emerging at once from their pupal chambers. In 

 Pennsylvania, Knull (1934, p. 208) found a pupa of Lepturoides 

 productus (Randall) on April 24, from which the adult emerged on 

 May 4 ; and the author collected larvae of L. denticornis in Minne- 

 sota on April 8 from which two adults developed by May 4. From 

 these observations, it would appear that in this genus hibernation is 

 limited to the larval stage, that the overwintering larvae normally 

 pupate with the first warm weather, and, in contrast to most Lep- 

 turoidini, the newly developed adults immediately leave their pupal 

 cells for mating and egg laying. 



On the basis of larval characters, Lepturoides is closely related to 

 Afhous. It is readily separated by the following combination of char- 

 acters : Dorsum dark brown to black-brown ; caudal notch small ; 

 outer urogomphal prongs (opr, fig. 33, d, e) very long, curving upward 

 and forward ; inner prongs (ipr) short and smooth, without posterior 

 tubercles; abdominal mediotergites (fig. 33, c) punctulate, but with- 

 out transverse rugae. 



The larvae may exceed 20 mm. in length. Dorsum usually very 

 dark, sometimes with a reddish undertone, darkest on prothorax and 

 head ; venter pale yellow or cream-colored. Ninth abdominal segment 

 (fig- 33> (^) with median dorsal groove (nig), without setae on cen- 



