TRIBE I. CRYPHALIXI. 619 



area, dorsal and lateral areas smooth, shining, not punctured. Elytra 

 with lateral and dorsal areas shining, strial punctures moderately coarse, 

 irregular, subconfused, declivity oblique, opaque, interspace 2 faintly im- 

 pressed, 1 and 2 with rows of granules, pubescence short. (Hopkins.) 



Type from North America or Cuba ex Schaum collection. 

 Morgantown, W. Va., in Qucrciis sp. ; January. Woodbury, N. J., 

 April, in oak stumps. (Wcnzel.) Mexico, West Indies, Central 

 and South America. 



Under the name "pubcsccns Zimrn." Hubbard gives the biology 

 of an insect which may be any one of three species, including 

 af finis. In this species a solitary female starts the galleries, in 

 each of which five or six eggs are deposited. The young, hatching, 

 feed upon the ambrosia which glistens on the walls like hoar 

 frost. The pupa* are formed lying free in the galleries and in 

 somewhat over a month from the egg the perfect beetles appear. 

 In time, besides the mother, 15 or 20 offspring females have be- 

 come adult, but only one or two males are commonly found. 

 A second generation may be started, but usually the seasoning 

 of the wood threatens failure of food fungus and the younger fe- 

 males depart to found new colonies in fresher tree trunks. The 

 deserted males sometimes establish bachelor colonies, Eichhoff re- 

 cording 50 or more packed in a single gallery. The ambrosia of 

 this species has short branching stems, terminated by single 

 spherical conidia; a brown stain accompanies the fungus. Many 

 kinds of trees are attacked, maple, orange, pine, oak and ash 

 being especially mentioned by Hubbard, but he admits difficulty 

 in distinguishing the species. The}' may be driven by hunger to 

 attack healthy trees, but it is only in the sapwood of dying tim- 

 ber that they succeed in establishing colonies. 



988 ( ). XYLEBORUS KILEYI Hopkins, 1915-a, 65. 



Oblong-elliptical. Dark ferruginous. Pronotum with sides faintly 

 narrowed toward base, posterior dorsal and lateral areas shining and 

 rather distinctly punctured. Front opaque, with faint median line. Elytra 

 moderately shining, with strial punctures very fine, obscure, interspaces 

 flat, faintly and sparsely punctured; declivity shining, subconvex, with 

 interspaces scarcely elevated, 1 and 3 armed with coarse granules, punc- 

 tures in striae 1 and 2 evident, posterior lateral margin smooth. Length, 

 female, 2.3 mm. 



Capron, Florida, April 25. 



989 ( ). XYLEBORVS HUBBARDI Hopkins, ]915-a, 65. 



Oblong-elliptical. Dark ferruginous. Pronotum elongate, with sides 

 parallel, slightly narrowed toward base, posterior dorsal and lateral areas 



