498 NOTES ON LACIINOSTERNA. 



19. L. congrua Lee. 



The collectioD contains 18 S , 9. Texas (coll. C. V. R. and J. B. 

 S.),9 3,6$ ; Louisiana (coll. J. B. IS.), <> <5 ; Missouri (coll. C. V. II.), 

 3 5. 



Dr. Iloni had no 9 before him when he wrote. That sex offers noth- 

 in i^ at all peculiar, and differs from the $ only in the lack of ventral 

 characters, and in the shorter auteuual club. In the series before me 

 there is a very marked tendency towards a darkening' of the thoracic 

 disk, accompanied by a corresponding - paling of the margin. The Texan 

 specimens are, as a whole, much paler in color and considerably smaller 

 (15""" to 19 mm ). The difference is scarcely racial, however, because one 

 of the Texan specimens is fully as large, and even darker than the 

 most fully developed of the Louisiana forms. 



The genitalia in both sexes are distinctive. In the $ the claspers 

 are symmetrical, free anteriorly, and tending to a vertical direction. 

 In the 9 the tendency is again to the modification of the superior plates 

 into the pnbic process. 



20. L. postrema Horn. 



Not in our collection ; described from a single $ specimen in Dr. 

 Horn's collection, which he kindly allowed me to use. 



The genitalia are distinctive, and are decidedly in the line of the 

 fusca type. The claspers are decidedly unsymmetrical, and as sug- 

 gested in the fusca group of characters. I have not been able to pro- 

 cure a 9 . 



21. L. affinis Lee. 



Many specimens, $ and 9 , most of them collected for the Museum 

 in the District; 1 9 , Kansas. Dr. Horn gives as localities Kansas, Col- 

 orado, Indian Territory, and Texas. Mr. Ulkehas it* also from Tennes- 

 see, and its occurrence in the District indicates a very wide distribution. 

 The species is a very well marked one, and shows no apparent varia- 

 tion. 



The $ genitalia are distinctly unsymmetrical, free in front, but im- 

 mobile, being completely united behind. The 9 characters are equally 

 strong. The inferior plates distinctly notched and toothed to accom- 

 modate the superior plates, which are very much reduced in size, and 

 act as a support to the double pubic process, which rests on spurs from 

 the inferior plates. 



It is likely that the species is local ; it has proved so at least iu the 

 District of Columbia, as is noted iu the introduction, to which reference 

 is also made for dates, etc. 



22. L. prunina Lee. 



Numerous specimens, $ and 9; 1 2, Texas (coll. C. V. R.); all the 

 others from Constantine, Mich , collected by Mr. Tyler Townseud. 

 Mr. Townseud informs me that he took all these on raspberry, early 

 in the evening, and that they were very abuudaut. It seems to be local 



