H. C. FALL. 159 



76. A. Iiiiroii n. sp.— Very dose to the preceding, the description of which 

 api)lies throughout, except in the following particulars: The front is never 

 depressed below the level of the eyes, and entirely lacks the juxta-ocular fossa 

 so characteristic of cavifrons. The antennal club is always more or less noticea- 

 bly paler than the intermediate joints, and the tarsi are somewhat stouter. The 

 ditference iu the latter respect is quite marked when compared with California 

 specimens of cavifrons, but less so when compared with examples from the Puget 

 Sound region. While it is possible that further experience may show Imron to be 

 worthy of no more than varietal standing, it is my conviction that the two forms 

 are now permanently geographically isolated, and that they must soon if they 

 have not already become distinct. 



Described from one male aud three females collected at Detroit 

 and Ann Harbor, Mich., by Mes-^rs. Hubbard and Schwarz. 



Since the above was written I have seen several specimens from 

 Illinois in Mr. Liebeck's collection. 



77. A. varicorne Smith. — Black, often with more or less seneous lustre, 

 rather conspicuously clothed with whitish hair, which becomes squamiforni 

 anteriorly and beneath. Beak rather slender, subcylindrical, nearly straight, 

 about as long as the head and thorax in the 9 > obviously shorter in the % ; base 

 slightly thickened, clothed with scales as far as the insertion of the antennse, 

 thence glabrous, polished and with well-marked punctuation. First joint of 

 antennse yellow, nearly or quite equal to the next two, second reaching the eye, 

 outer joints transverse. Front very little wider than the tip of the beak, with a 

 more or less distinct, fine, median sulcus; eyes not prominent. Prothorax a little 

 wider than long, widest a little before the base; sides rather strongly divergent, 

 moderately arcuate; apical constriction feeble, not at all sinuate before the basal 

 margin, which is not expanded ; surface closely, strongly punctate; basal fovea 

 small. Elytra nearly one-half longer than wide, subparallel or a little wider 

 behind the middle; humeri not prominent; no post-humeral sinuation ; striae 

 not deep; intervals wide, flat. Beneath rather coarsely, not very closely punc- 

 tate; meso and metasternal side pieces more densely clothed; legs stout, first 

 tarsal joint usually a little longer than wide, second as wide as long, or some- 

 times obviously transverse. Length 1.5-1.9 mm.; .06-. 08 inch. (PI. V, figs. 

 4 and 4a). 



The sutural angles are somewhat rounded in the male. 



Hab. — Georgia, Florida. 



Under the name varicorne I have included a mass of material, 

 from which it would be quite easy to select from diverse localities 

 forms so varied as to make possible the definition of four or five spe- 

 cies; but a careful .study of nearly one hundred and fifty examples 

 has thus far reudered all attempts at subdivision unsatisfactory. As 

 further experience, however, may prove the necessity of separation, 

 as a guide to a more definite cabinet arrangement, I indicate below 

 the lines along which my study leads me to believe the separation 

 will take place. 



TRANS. AM. ENT. S(5C. XXV. OCTOBER, 1898. 



