BEETLES FEEDING ON THE OAK. 221 
417. Hypothenemus dissimilis Zimm. Boring, with the succeeding spe- 
cies, which may be the other sex, in oak twigs. (J. B. Smith, 
Ent., Ainer., March, 1890, 54.) 
418. Hypothenemus erectus Lee. 
419. Dicerca asperata Lap. and Gory. (Chittenden, Ent. Amer., v, 218.) 
420. Prionus \1) sp. Received January 20, 1881, from H. H. Rusby, 
a coleopterous larva found boring in a stick of oak at Silver 
City, N. Mex. The larva is evidently that of a species of Prionus. 
(Riley's unpublished notes.) 
421. Prionus californicus (?). Received January 14, 1881, from Mrs. A- 
E. Bush, San Jose, Cal., the larva of some Longicorn found in 
" white oak," which in all probability is that of the above in- 
sect. Two others were received from the same person and locality 
in April. Not bred. (Riley's unpublished notes.) 
422. Pityophthorus minutissimus Zimm. February 7, 1882. This insect 
was found at this date in large numbers, both in the imago and 
larva state, under the bark of a dry piece of oak wood. Their 
mines, as a rule, run parallel with the wood ; rarely transversely. 
(Riley's unpublished notes.) 
423. Lachnostema quercina Knoch. Beetle devours the leaves of vari- 
ous trees at night. This beetle entirely denuded the pin and post 
oaks on W. C. Flagg's place at Alton, this year. (Riley's unpub- 
lished notes.) 
424. Fidia sp. June 25, found many Fidia beetles on oak and hickory 
eating large holes in their leaves, (liiley's unpublished notes.) 
425. Cryptocephalus notata, Fabr. Feeding on oak, sassafras and elm. 
(Riley's unpublished notes.) 
426. Coscinoptera dominicana Fabr. June 11, 1873, Riley records the 
beetles as found in copulation on young oak. The larva feeds, 
however, on dry leaves, and he has published a full account of 
the species. (6th Rep. Ins., Mo., pp. 127-132.) 
427. Centronopus calcaratus Fabr. " Inhabits black oak stumps. It 
remains in pupa two weeks." (Horn.) 
428. Centronopus anthracinus Knoch. May be taken in company with 
the preceding species. (Horn.) 
429. Acanthoderes ±-gibbus Say. Bores in dead twigs of oak. (Si hwarz.) 
430. Trag idion fulvipenne Say. Bores in oak. (Riley.) The mode of 
egg-laying is described by Popenoe in Insect Life, ii, 192. 
431. Arhopalus fulminans Fabr. Red oak. (Fitch & Hadge, also 
Riley.*) See chestnut insects. 
432. Ataxia crypta Say. Found by myself under the bark of the oak 
at Chattanooga, Tenn. (Identified by Dr. Horn.) 
* Numerous larvae of this insect were found January 10, 1882, Washington,!). C, 
boring in dry red-oak wood. All the younger larvae were working under the bark, 
the fully grown specimens, however, gnawed a channel into the solid wood for the 
purpose of pupation. By the 7th of February pupae were found ; the beetles com- 
menced issuing the 13th of March. (Unpublished notes.) 
