— 139— 



Note on Fornax calceatus Say, and F. Hornii Bo?w., and 



on Corymbites divaricatus Lee. and C. crassus Lee. 



Bv Frederick Blanchard. 



Mr. Chas. Dun' has mentioned in Ent. Amer. , vol. IV, p. 163, 

 that Fornax Hornii is the 9 ^'^ calceatus. I had not identified the 

 former, but on exhibiting to Dr. Horn a series o{ calceatus, assorted ac- 

 cording to sex, he at once remarked thai the 9 ^^''^'^ what is described 

 as LLornii. The antenna; art; slender and filiform, in the (^ reaching 

 three joints beyond the hind angles of ih- ihorax and as far as the hind 

 coxze, but in the 9 <^^nly extending one j"int behind the thoracic angles; 

 the second joint is inserted beneath the apex (jf the first so as to be 

 partly hidden i\\m\ above, when observeil from below, however, in the 

 (^, the second, third and fourth joints appear to be about equal in 

 length, or the third may be a trifle longer ; in the 9' ^^e third joint is 

 quite distinctly longer than the second or fourth, and on this difference 

 chieflw is based the name Hornii-, the second joint is not really shorter 

 than in the (^, but it looks shorter in comparison with the greater length 

 of the third. 



I observe that in this species and also in three species of Dromce- 

 olus. basalis, cylindricollis and striatus, which are before me, all having 

 filiform antennae, that the thighs are rather deeply grooved and broad at 

 the apex, the lower angle being laminiform and partly protecting the 

 tibiae in repose. In Droma;olus pusillus, having serrate antenna;, the thighs 

 though grooved beneath for the reception- of the tibicC are narrowed at 

 tip without distinct expansion of the angle. In Fornax calceatus the 

 claws are also simple as in Drofnceolus ; the coxal plates are strongly 

 dilated inwardlv and usually strongly angulale, but specimens occur 

 with the posterior inner angle considerable rounded. The (^ has the 

 thorax more narrowed in front ; the lateral pieces of the ^ intromittent 

 organ have a hook-like barb at tip. ' 



The larger female greatly exceeds the male in size, the (^ being 

 4.5—5 mm., and the 9 5 — 7 "i""*- 



The species occurs rather abundantly in Mass. and N. Y., under 

 bark of pine stumps in May. 



The only other species of Fornax at hand as I write is orchesides, 

 which has toothed claws, the antenna; are strongly serrate and do not 

 differ appreciably in the sexes, the second joint is here really very short 

 while the third is longer than the fourth and equally broad. The eyes 

 encroach more upon the antennal grooves than in calceatus, in fact com- 

 pletely occupying them. The thighs are grooved beneath, but narrowed 



