504 NOTES ON LACHNOSTERNA. 



Georgia. The specimens from New York and New Jersey are from my 

 own collection, ami form the small minority of the specimens taken. 

 The specimeus from central Missouri are from Professor Riley's collec- 

 tion, and the figures in the Missouri Reports, so extensively copied, 

 probably represent this species. 



33. L. insperata Smith. 



Agrees very completely with Dr. Horn's description of fusca, and 

 offering superficially no obvious differences. The ventral characters of 

 the male resemble those of dubia and arcuata, the ridge being strongly 

 arched and small, but situated back from the posterior margin ot the 

 segment, and not overhanging the last ventral. In the female, I have 

 found no distinctive characters. Six specimens, taken under stones 

 early in spring by Mr. M. L. Lin ell, at Snake Hill, New Jersey, are be- 

 fore me — four of them males, two of them females. The specimens are 

 dark in color, and large and stout, resembling most nearly the larger 

 form of fusca, which occurs with it. The male character is recogniz- 

 able, and I separated out the specimens from a lot of fusca at sight. 

 The genitalia of both sexes bear out the intermediate position assigned 

 by the ventral characters. 



The claspers of the male are symmetrical — an unusual character — yet 

 in structure combiniug the features of both arcuata and dubia. The 

 female is equally characteristic — more nearly allied to dubia perhaps 

 both in the form of the superior plates and the pubic process. The 

 plates are larger than in dubia, but not nearly so well developed as in 

 arcuata. Other differences will appear at a glance by a comparison of 

 the figures. 



I was not quite prepared for this species, coining as it did from a 

 region from which 1 had many spesimens.* It well illustrates, however, 

 how really slipshod much of the collecting is, eveu with " good" col- 

 lectors. 



34. L. dubia Smith. 



Completely resembles fusca in all outward appearance and habitus. 

 The ventral characters of the male must be resorted to for the identifi- 

 cation of that sex. As appears from the figure, the ridge is decidedly 

 less curved than in arcuata, and more curved than in fusca, and is in 

 every respect more distinctly marked than the latter. The primary 

 characters will show, on comparison with the following species, a consid- 

 erable change of type, which should be followed by a corresponding 

 change in external habitus, but if it is, we have not yet discovered it. 

 In the female the differences of the male become emphasized. The 

 pubic process is broad, stout, somewhat contracted medially, and 

 divided superiorly into two branches which are broad, somewhat flat- 

 tened, and obliquely truncate. The superior plates are narrow, linear. 



This species is in the collection from Massachusetts, New York, New 

 Jersey, Maine, North Carolina, District of Columbia, Illinois, Ohio, 



' I have siuce received it from Chicago, Illinois (Westoott). 



