610 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



14. The Cei.tis Graphisurus. 

 GrapMsurus trianguJifer (Hald.). 

 Larva burrowing under the old bark of Celtis iexana, partly in the bark and partly 

 in the wood ; issuing, in July, as a long-horned beetle. 



Fig. 200. — The Hackberry Graphisurus: a, larva; b, pupa, ventral view ; c, female beetle — 

 enlarged; d, mouth-parts of larva from beneath — still more enlarged. (Original.) 



This iusect is not uucommon in the Southwestern States, but was 

 described by Haldeman in 1847 (Trans. Am. Phil a. Soc, vol. x, p. 45) 

 from specimens obtained in Alabama. It is a rather pretty beetle, 

 about half an inch long, clothed with fine pubescence and mottled with 

 brown and yellow, the legs and feelers annulate with yellow. Its food- 

 habits and early states have not, I believe, heretofore been recorded. 

 My notes of the insects obtained during the cotton-worm investigation 

 show that it was not uncommon under the bark of the Hackberry, affect- 

 ing diseased or partly dead trees, so that it injures chiefly in hastening 

 the decay of such timber. Larvte and pup?e were found by Mr. Schwarz 

 at Columbus, Tex., nnder the bark of Celtis texatia, June 15, 1879, and 

 the adult insects were obtained about the end of July. 



The larva and also the pupa are very similar to the like states of allied 

 wood-borers, and any description of these states, to be of value, should 

 be based on a comparative study of related forms. Our knowledge is 

 too fragmentary at present to allow of such comparison and the follow- 

 ing brief description is based merely on the species under treatment. 



Xari'a.— Average length 22'"™. General color yellowish-white. Mandibles and 

 ring about the head connecting with the base of the mandibles, reddish-browu ; head 

 a little more than one-half the width of the prothoracic joint; mandibles strongly 

 tapering from the base, tip slightly excavated or bidentate— the lower tooth project- 

 ing somewhat beyond the upper ; clypens trapezoidal, more than twice as wide as 

 long, marked with six deeply impressed lines; labrum rounded, tip truncated, 

 densely clothed on exterior edge with yellowish hairs ; antennje light-colored, three- 

 jointed ; two basal joints eubequal, tip of second joint truncated, armed with hairs 

 and bearing the minute apical j oint near its outer margin ; labrum and maxillai 

 clothed with yellowish hairs ; maxillary palpi apparently three-jointed, first joint 



