16 



MISCELLANEOUS FOREST INSECTS. 



by distinct sutures, and in this respect is very different from that in 

 Dendroctonus, in which it is fused with the palpifer and subgalea. 

 The maxillary palpifer is large and stout and from an intern o-lateral 



Gulai- mture 



Fig. 4.— Dendroctonus valcns: Head, ventral aspect, and mouth parts. A, Labium; B, maxilla, interno- 

 lateral aspect; C, same, externo-lateral aspect; D, hypostomal region, dorsal aspect; E, head, ventral 

 aspect; a, ba.sal fossa of mentum; 6, joints; c, basal membrane; d, palpiferal area; c, stipal area; /, sub- 

 galeal area; g, fossa; h, muscle processes; k, median condjie; I, lateral fossa; m, anterior condyle; n, 

 median fossa; o, posterior condyle; p, hypopharyngeal bracon; q, submental process; r, maxillary con- 

 dyle; s, gular apodeme; «, oral foramen; v, occipital apodemc; ?/•, postgular piece. (Author's illustra- 

 tion.) 



aspect is longer than the stipes and cardo together and much longer 

 than the palpus. It is separated from the subgalea and stipes by 

 distinct sutures, and resembles a very large first joint of tlie palpus. 



