1917] 



Phytogeny of the Elateridce 



249 



The second tribe of the Pyrophorinae, the Pityobini (Fig'. 

 3), is characterized in the larval stage by having the sub- 

 mentum triangular and the mandibles with three teeth on the 

 inner surface. The adults have flabellate antennae in the 

 males; a distinct transverse carina on the front above the 

 "plaque nasale;" joints two to four of the tarsi with short 



Fig. 3. Pityobius angninus Lee. a, dorsal aspect of left mandible; b. inner aspect 

 of same; c, dorsal aspect of 9th abdominal segment; d, lateral aspect of 

 9th and 10th abdominal segments, (10th reconstructed); e, dorsal 

 aspect of head; f, labium and maxillae. 



lobes and the first tarsal joint longer than the two following 

 joints united. This tribe is of remarkable interest as it is 

 intermediate between the two main subdivisions erected by 

 Schiodte and Henriksen, having the retinaculum of their second 

 tribe and the triangular submentum of their first tribe. This 

 bears out my conclusion that the shape of the ninth abdominal 



