24 ENTOMOLOGICAL NEWS.. [Jan., '03 



the sides and breast as distinctly as in a lepidopterous pupa ; the abdomi- 

 nal portion consists of seven segments, which have basal and sub-central 

 rows of bristles, and dark brown shining spiracle nodes ; the end of the 

 terminal segment is bispinose, with spine-like bristles on the sides. 

 Length, ?, 17 mm. ; tf, 13 mm. (Fig. 2.) 



Loew's description was based on a 9 , with which the New 

 Jersey specimens agree in every respect except that only the 

 second, third and fourth segments are red, the fifth being 

 black ; a specimen from Michigan also has the fifth segment 

 black. L,eng h, 15 mm. 



The male, .vhich has not been described, differs from the 

 female in having the abdomen entirely black and measuring 

 only ii mm. :n length. 



Xylophagns lugcns L,oew, was also bred from larvae found in 

 decayed oak and chestnut ; they resemble those of X. abdoniin- 

 alis except that one less segment is chitinized. The pupa has 

 the antennal processes more recurved, lying close to the side 

 of the cephalic portion, with a short hook-like spine, extend- 

 ing laterally from the base of each. 



Xylomyia amerhana Wied., and Xylomyia tenthredinoides v. d. Wulp. 



Xylophagns americanus Wied. Dipt. Exot. i, 51 ; auss. zw. i, 84. 



Siibula tenthredinoides v. d. Wulp. Tijdschr. voor. Entom. ii, 2 ser. 

 132, Tab. iii, f. 5. 



On June i Mr. E. Daecke captured at Castle Rock, Dela- 

 ware Co., Pa., a number of Xylomyiae which has lead me to 

 make a more careful study of the descriptions of X. americana 

 and X. tenthredinoides. The specimens all lack a distinctive 

 feature clearly given by Wiedeman, viz. : Middle of the first 

 segment black, sides yellow ; the second and third segments 

 red, with a posterior margin of yellow, in front of which is a 

 short transverse line of black ; the remainder of the segments 

 red, margined posteriorly with yellow. A 9 collected by Mr. 

 Chas. A. Voelker, at Clifton, Delaware Co., Pa., and a k from 

 Mr. R. J. Weith, Klkhart, Ind., agree with Weidman's de- 

 scription. 



Xylomyia tenthredinoides has the first segment entirely black, 

 or with the posterior half reddish and the remaining segments 

 red without the yellowish posterior margin. In the 9 a black- 

 ish lateral margin extends from the first to the fifth segments, 



