270 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



September 14tii, 1ST8. — Biological Section. 



Three members present. 



Mr. J. D. Putnam stated tliat among the collections recently 

 brought from Mexico by Dr. C. C. Pari*}^, were two fine speci- 

 mens of Thelyphonus giganteus^ Lucas, from Saltillo, called 

 " VinagriUo'''' by the natives, from the fact that when disturbed 

 it emits an odor resembhng that of vinegar. It is reputed to 

 be venomous, and to sting by the tail ! There are also several 

 specimens of botli sexes of a species of Gluvia^ found com- 

 monly under stones in the vicinity of San Louis Potosi. The 

 female of this species does not appear to differ essentially from 

 the Gluvia prcecox of Koch, while the male appears to be Glu- 

 via cinerascens Koch, the two sexes showing a remarkable 

 difference in the structure of the mandibles, as has already 

 been noticed in the Galeodes pallipes Say, and G. subulata 

 Say. 



The following papers were presented : 



Descriptions of some Species and Varieties of North American Hetero- 

 ceres, mostly new. 



BY HERMAN STRECKER. 



Hypoprepia Cadaverosa, N. Sp. 



(Plate IX, fig. 4 ) 



Size and shape ot H. Miniata, Kby; head and body pale ochre yellow, 

 antennae black; tarsi black. Uvper surface : Primaries same pale ochra- 

 ceous as the body, and with three broad pale slate colored bands arranged in 

 tlie same way as in Miniata, K., and Fucosa, H., but these bands are broader 

 than in these species, leaving less of the pale ground color visible; fringe 

 pale slate color. Secondaries, same color but somewhat paler than the prima- 

 maries; costal margin pale slate color ; exterior margin with a rather broad 

 border of same color. Under surface as above, but paler. 



A number of this species were taken by H. K. Morrison In Colorado in 

 the summer of 1877. The example from which the above description 

 was drawn I received from Mr.W. Geffcken, of Stuttgart, Germany, who 

 bought it along with other species from Morrison. 



Arctia Geneura, N. Sp. 



(Plate IX, fig. 5 S). 



i expands \% inches. Head flesh colored between the eyes, paler and yel- 

 lowish above, and wUh a black spot; palpi blackish; thorax pale flesh color 

 as in Virgi) and allies; the protho/ax witli two black stripes; the thorax with 

 three, one in the middle and the otliers on the tegulie; abdomen scarlet, same 

 shade as in Pfit/IUra, Dru , with a dorsal row of black spots, and another row 

 of smaller spots on the sides; beneath pale flesh color, with two rows of small 



