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76 Annals Entomological Society of America [Vol. XIII, 



Lachnosterna longitarsa Say (Plate I, Fig. 4). 



A good series of this species was taken in flight at Man- 

 hattan during the summer of 1917. Illustrations of the female 

 genitalia are lacking in Smith's paper. In the female the 

 inferior plates are subquadrate and the superior plates are 

 triangular. The pubic process is reduced to a small pro- 

 tuberance between the superior plates. 



Lachnosterna hirtiventris Horn (Plate I, Fig. 3). 



A number of specimens of this species are in the writer's 

 collection from southern Kansas. Only the male genitalia are 

 figured in Smith's work. The superior plates in the female are 

 lightly corrugated and the pubic process is deeply cleft and 

 slightly divaricate. 



Lachnosterna calceata Lee. (Plate I, Fig. 1). 



L. calceata is a common species in the southern half of 

 Kansas. Smith does not figure either sex of this species. The 

 genitalia of the male are symmetrical and approach the L. 

 crassissima type. In the female the superior plates are modified 

 into the pubic process which is elongate, bifid and tapering to a 

 point. 



Lachnosterna glabricula Lee. (Plate I, Fig. 6). 



The males of this species are common in the vicinity of 

 Manhattan during July and August. Three females were 

 found around the roots of sumach {Rhus sp.) in 1917, in an 

 area from which the males were emerging in large numbers. 

 The pubic process in the female is wanting. The superior 

 plates are fused, deeply emarginate and fringed on the posterior 

 end with moderately long hairs. 



Lachnosterna tristis Fab. (Plate I, Fig. 5). 



This species is rare in some sections of Kansas. Smith 

 presents figures of the male genitalia only. The female genitalia 

 are rather simple as in L. heterodoxa, consisting of an unique 

 development of the inferior plates. In the case of L. tristis, the 

 grooves formed by a fold on the ventral side of the inferior 

 plates are longer and apparently deeper than in L. heterodoxa. 

 The posterior ends of these plates are fringed with slightly 

 recumbent hairs. 



