500 NOTES ON LACHNOSTERNA. 



No variation appears in our specimens. 



The genitalia are very like those of the micans type, and in the S are 

 sy m metrical. No 9 specimen has been at hand for study. 



26. L. errans Lee. 



There is one S specimen from California in the Museum collection 

 received from Mr. Ulke. 



The $ characters of the species are simple. The claspers are sym- 

 metrical and contiguous, if not united in front. They are quite dis- 

 tinctive. 



27. L. inversa Horn. 



Numerous specimens— $ and 9. Virginia (coll. J. B. S.), $ , 9; 

 Illinois (coll. C. V. R., J. B. S.), 5 9 ; Tennessee (coll. C. V. K.), on 

 Apple, May 24. For specimens from District of Columbia collected for 

 the Museum, see dates, etc., in the introduction. 



This species was one of the most common at Washington in 1S88, 

 and is easily recognizable. In the $ the ventral character is obvious; 

 in the 9 the species closely approaches fusca — sensu lata — and is dis- 

 tinguished from arcuata by the nou-emarginate terminal ventral seg- 

 ment, and from fusca— strictly speaking— by the much more feebly 

 spiuose posterior tibia, there being no distinct rings of spines. 



The genitalia are distinctive in both sexes. The claspers of the 3 

 are decidedly dissimilar, and very strongly marked. The 9 has the 

 pubic process very characteristically developed, and the superior plates 

 distinct. The figure must be referred to, to appreciate the structures. 

 Dr. Horn did not have inversa from the District of Columbia, and I 

 have not seen it from northern collections. 



28. L. bipartita Horn. 



There are 12 $ , 4 9 in the Museum collection. Louisiana, collected 

 by Morrison, 11 $ , 1 9 ; Tennessee (coll. C V. R.), 1 9 ; Kirkwood, Mo., 

 April 1G (coll. C. V. R.), 1 $ , :2 9 . This considerably extends the north- 

 ward and eastward range of the species as given by Dr. Horn. The 

 specimens are very uniform in appearance. 



The genitalia of the specimens examined are distinctive and peculiar 

 by the twisted processes on the iuuer side of the clasper, which are 

 more characteristic of a later division. In the 9 , also the pubic proc- 

 ess is developed much more in the line of the rugosa group than of its 

 immediate allies. 



Some of the Kansas specimens examined from other collections indi- 

 cate a new species with essentially the characters of the present, par- 

 ticularly as to the ventral segments of the $ . It will require care- 

 ful study of series from all localities to make certain of this. In Kan- 

 sas, I think there are still many new species to be discovered. 



29. L. micans Knoeli. 



There are numerous specimens of both sexes in the collection. Lousi- 

 ana (coll, J. B, S. and Morrison), 26 $ , I ? j Tampa, Fla., March 3§ (coll, 



