1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 4 ( J.') 



Laeknostema inversa Horn. Lachnosterna villifrona Lee. Mule Ulke). 



micana Knock, balia Say (fide Dike), 



arcuata Smith. hirticula Kuoch. 



dubia Smith, ilicis Enoch. 



uiargiualis Lee. (fide Ulke). hornii Smith, 



fraterna Harris. crenulata Frohl. 



nova Smith. quercus Enoch (fide Ulke). 



hirsuta Enoch (fide Ulke) tristis Fabr. 



In all, twenty species, four of them heretofore undescri bed or not rec- 

 ognized as distinct. There is no reason why other localities should 

 not do as well, and I am firmly convinced that there are still many new 

 species to be discovered. 



To this list of species occurring- in the District of Columbia must be 

 added the following, represented in the local collections: 



Lachnosterna congrua Lee. (Coll. Ulke); grandia Smith (Coll. div. : 

 Iuctuosa Horn (Coll. Schwarz); profunda Blanch (Coll. Ulke); 

 parvideus Lee. (Coll. Ulke). 



This gives a total of twenty-five species, a rather disproportionate 

 representation of the total number for so small a territory in so widely 

 distributed a genus as Lachnosterna, and it indicates a considerable 

 addition to the number of species when careful collections shall have 

 been made. These collections Dr. Horn's paper have made possible, 

 and it well illustrates the peculiar and intuitive perception of relation- 

 ships so marked in the doctor's work that nearly all of his groups turn 

 out to be perfectly natural after the study of the genital organs. 



To the kindness of Mr. TVestcott, of Chicago, I owe a chance to ex- 

 amine some of the catch recorded in an 1888 number of Entomologh a 

 Americana, and among them I found the following: Lachnosterna <jii>- 

 bosa, 230 3,29; Lachnosterna dubia, 10 $ ; Lachnosterna fasca, 53 S , 

 2 9 ; Lachnosterna grandis, 1 $ . 



The preponderance of the males is easily explained by the faet that 

 these collections were all made at light, and the males are always Aery 

 much more numerously attracted than the females. 



To the kindness of Mr. Ulke I owe a large lot of specimens collected 

 at the electric light at Cleveland, Ohio, and these proved all of one 

 species — the true fusoa. There were 150 males and 71 females. 



NOTES ON THE SPECIES, PRINCIPALLY IN THE MUSEU3I COLLECTION. 



1. L. lanceolata Say. 



We have numerous specimens, $ and 9 : Texas (Coll. Riley and 

 Smith), Kansas (Coll. Riley and Smith), Xew Mexico (Coll. Smith), 

 Colorado, July (Riley), Missouri (Riley). 



Our Kansas specimens are decidedly paler than the specimens from 

 the other localities, and do not seem to be immature. Mr. Ulke's col- 

 lection has specimens from ^Nebraska and Dakota. 



The genitalia of both sexes are shown at PI. xlviii, tig. 1. They are 

 extremely simple, and resemble closely the forms found at the extreme 



