512 NOTES ON LACHNOSTEKNA. 



on each side. Yet all the other characters of structure and habitus 

 refer the species here, while it would be otherwise associated with en- 

 tirely incongruous material. Under the circumstances I regard the 

 nine joints as accidental, and shall expect other specimens to show the 

 typical 10-joiuted form. 



It is quite possible that the foveate impressions of the thorax are not 

 constant, but they are quite symmetrical in the specimen before me, 

 and are very distinct. 



The claspers of the male genitalia are, as usual, distinctly dissimilar, 

 and characteristic. It will be interesting to obtain the female. 



48. L. luctuosa Born. 



The collection contains 2 S , and 2 9 from South Carolina (coll. C. V. 

 R.). The specimens are all very dark, and the female is but slightly, if 

 at all, more ventricose than the male. 



The genitalia of both sexes have been examined; the claspers of the 

 male are unsymmetrical as usual, but offer no striking characters. The 

 female structures are more distinctive, showing the rudimentary supe- 

 rior plates, and the bifid pubic process. Mr. Schwarz has taken the 

 species in the District. 



49. L. corrosa Lee. 



Not in the Museum collection. It is recorded from Illinois and Texas. 

 Mr. Ulke has it from Dakota and Minnesota, and it will probably turn 

 out as widely distributed as most other species. 



I owe to Dr. Horn the opportunity of examining the female, and to 

 Mr. Schwarz the male. Both sexes have the genitalia very strongly de- 

 veloped. The claspers of the male are very dissimilar, and of the same 

 type as that of the majority of the species in this group. In the female 

 the superior plates and pubic process are fused, producing a very 

 strongly marked form of a type similar to that of hornii, but smaller and 

 less modified. 



50. L. scitula Horn. 



Not in the Museum collection. Dr. Horn has it from Texas, and kindly 

 allowed me to study the species. The male genitalia have the claspers 

 most remarkably modified, and are very different from anything else in 

 the genus. The figures must be left to explain the structures. 



51. L. knochii Gyll. 



The Museum has 2 $ from Kansas (coll. Morrison), and 1 9 Texas 

 (coll. J. B. S.). 



Dr. Horn gives the habitat from Massachusetts to Georgia, and this 

 is therefore a very decided extension of the limit. The species seems 

 rare. In several years collecting around New York City, I found but 

 a single specimen, and that quite early in my experience, for I remem- 

 ber it had a common pin through it. I can not find that others have 

 taken it much nore abundantly. 



The genitalia are distinctive, yet of very much the same type as the 

 immediately preceding aud following species. 



