121 



The Genus Orthotomicus Ferrari. 



Ferrari, Borkenkafer, 44, 1867. 



Neotomicus Fuchs. 



Fuchs, Morph. Stud. u. Borkenk., 38, 1911. 



Key to the Species. 



A The apical margin of the declivity acute, entire, and well defined; the 2nd 



visible segment of abdomen much shorter than the 3rd and 4th together; 



the prosternal process elongate and very acute; larger and moderately 



stout species, the length usually over 2-5 mm. 



B The elytral strise rather strongly impressed; the strial punctures rather 



coarse and very close; the interstrial punctures deep and uniseriate, 



nearly as large and numerous as those of the strise on the caudal half 



of the disc, making the interspaces rough; the face of the declivity 



coarsely punctured. caelatus Eichh, Page 121, 



BB The elytral strise feebly impressed. 



C The strial punctures coarse and not very close, the interstrial punc- 

 tures nearly as large and close as those of the strise. 



punctipennis Lee. Page 122. 

 CC The strial punctures rather small and only moderately close; the 

 interstrial punctures very small on the disc, becoming more 

 numerous and nearly as large as those of the strise near the 

 declivital margin; the discal interspaces rather smooth and 

 shining; the declivital face finely punctured. 



vicinus Lee. Page 122. 

 A A The apical margin of the declivity rather ill-defined towards the suture 

 and very narrowly separated from the elytral apical margin; the 2nd 

 visible segment of the abdomen as long as the 3rd and 4th together; 

 small species, slender, usually less than 2-5 mm. in length. 

 B The front densely granulate; the pronotum elongate, with the sides 

 parallel far beyond the middle and finely punctured behind; the 

 elytra finely regularly striate, the strial punctures very close and 

 moderate in size, the interstrial punctures small, larger and granulate 

 towards the declivity; the declivity decidedly concave, strongly 

 punctured, coarsely toothed, the 2nd and 3rd teeth very coarse in 

 the male. ornatus Sw. Page 122. 



BB The front coarsely punctured; the pronotum arcuate on the sides, 

 rather coarsely, densely punctured behind; the elytra not striate, the 

 strial and interstrial punctures very small and not close, the inter- 

 strial nearly as numerous and as large as the strial and hardly larger 

 or granulate behind; the declivity broadly sulcate, very feebly 

 punctured, fc2bly toothed, very feebly in the female. 



lasiocarpi Sw. Page 123. 



Orthotomicus caelatus Eichh.; Berl. Ent. Zeit., 402, 1867 (Tomicus); 

 Rat. Tom. 274, 370, 1878; Zimmerman, Am. Ent. Soc. Trans., 2: 

 146, 1868 {Xylehorus) : xylographus Fitch, Nox. Ins. N.Y., 4th Rept. 

 716, 1858 (Tomicus). 



Length, 2-3 mm. to 3 -4 mm., usually about 3 mm. The declivity 

 of the male is distinctly concave, with three teeth on each side, the 

 2nd and 3rd coarse, slightly within the margin; that of the female is 

 less concave, less distinctly margined, with the teeth smaller, (PI. 13, 

 fig, 3). 



