THE GENUS DENDROCTONUR. 

 BIBLIOGRAPHY. 



99 



Jtcndroctonus mexicanus Hopkins, 1906c, p. 80, original description, both sexes, 

 host. etc. 



FIG. 60. Dendroctonus mexicanus: Distribution map. (Original.) 

 7. Dendroctonus parallelocollis Chapuis. 



(PI. Ill, fig. 7.) 



Adult. Typical female: Length, 6.1 mm., deep black; elytral decliv- 

 ity with long hairs; head with front convex, shining, without dis- 

 tinct frontal tubercles each side of the shallow median groove ; elytral 

 striae not impressed or distinctly punctured except at vertex; elytral 

 rugosities obtuse, rather densely placed, moderately coarse toward 

 suture, fine and less evident toward and on the lateral area; striae 

 obscure, especially on the lateral area. Pronotum with numerous 

 short, reclining hairs and with very long, erect hairs on the entire 

 lateral area, punctures distinct. Secondary sexual characters: Pro- 

 notum with transverse ridge across the anterior area; elytral declivity 

 subconvex, shining; striae distinct, slightly impressed, punctures 

 rather distinct; interspaces with a few granules and sparse punctures, 

 the lateral areas more rugose and coarsely punctured. 



Typical female labeled, name label, "Hopk., January 16/08, 

 liichoacan, Mexico, A. L. Herrera, collector, 9 , Hopk. U. S. 2896b." 



Typical male: Length, 6 mm. Head with front convex and with 

 prominent frontal tubercles each side of a deep groove. Pronotum 

 with transverse impression across anterior area; elytral declivity 



