JUNIPER WORMS. 



907 



again the 13th of May, 1881. It is probable that the beetles had hiber- 

 nated in their mines, having transformed into the pupa state the pre- 

 vious autumn. The mines may be recognized by their long sinuous 

 shape, beginning very small and gradually widening and ending in a 

 broader space or cell where the larva transforms into the beetle condi- 

 tion; just before the cell, at its widest part, it measures 6""" in width. 

 The larva, as it eats its way along under the bark, does not sink deeply 

 into the wood, simply scoring it, while the gallery is filled behind it with 

 the tan-brown castings of the worm, consisting of partly digested bark, 

 forming a fine paste which hardens and compactly fills the shallow 

 groove. In general appearance the mine of this borer does not essen- 

 tially differ from that of most of the superficial longicorn borers of other 

 trees. The beetle is entirely deep Prussian blue, and may be readily 

 identified by its color. It varies much in size. 



3. The blue-clouded hylotrupes. 

 Hylotrupes ligneus Fabricius. 



We have not personally observed the habits of this borer, which is 

 said by Mr. George Hunt to bore under the bark of Juniperiis virgini- 

 <ma in Rhode Island. The beetle may easily be recognized by its 

 brown head, antennae, prothorax, and legs ; while the wing-covers are 

 yellowish, with two large adjoining dark Prussian blue patches at the 

 base, the patches rounded behind and extending 

 to the middle of the wing-covers ; the terminal 

 third of the wing-covers are also deep Prussian 

 blue, so that only the edges and a transverse 

 copal-yellow band across the wing-covers are 

 left. It is from 9"™ to 12'"" in length. 



AFFECTING THE LEAVES. 



4. The juniper twig inch-worm. 



Drepanodea varus Grote and Robinson. 



Order Lepidoptera; family Phal^nid.e. 



(Larva, Plate x, fig. 1.) 



Very closely resembling the smaller twigs of the juni- 

 per, a rough-bodied span or measuring worm an inch and 

 a half long, transforming to an ocher-brown moth. 



The accompanying engraving well represents this singular mimetic 

 form, which so closely resembles in form and color the smaller twigs of 

 the juniper. Two of the caterpillars are represented, one holding itself 



Fig. 300 — Hylotrupes ligneus. — 

 Smith del. 



