1913.] NATURAL SCIENCES OF PHILADELPHIA. 491 



Cabin John Run, Md. 



Average of series. 

 d'd' 9 9 



Length of body 6.4(5.7-7. ) 6.7(6.6-6.9) 



Length of pronotum 1.6 (1.4-1.7) 1.7 (1.4-1.8) 



Caudal width of pronotum 2 . (1.9-2.1) 2.1(1.9-2.3) 



Length of tegmma 4.2 (4. -4.4) 2.9 (2.8-3. ) 



Length of caudal femur 4 . 4 (4 . 1-4 . 7) 4 . 9 (4 . 8-5 . 3) 



Greatest width of caudal femur 1 .7 (1 .6-1 .8) 1 .9 (1 .8-2 . ) 



Length of ovipositor 2.7 (2.5-2.8) 



The extremes in size found in the material before us are given in 

 the above measurements. Although the series are not large, it is 

 possible to see that there is but little variation in the species. The 

 eastern specimens average somewhat .smaller than those from Indiana. 

 In the original description the measurements for the male sex are, as 

 has been stated, taken from a specimen of .V. maculatus, while those 

 of the female are, unfortunately, in almost every case exaggerated. 



Color Notes. — All of the specimens before us are of very much the 

 same coloration. Head, pronotum, and tegmina shining piceous, the 

 latter transparent in the male, nearly transparent in the female. 

 Maxillary palpi with proximal segments piceous, last two segments 

 white and very striking. Dorsal surface of abdomen dark bistre; 

 in the specimens of somewhat lighter coloration, bistre with the 

 margins of the segments darker. Limbs and ventral surface of body 

 immaculate raw umber; in dark specimens mummy brown. Both 

 males and females of the present species have a very shiny appearance. 



Distribution. — The present species has been taken on the Atlantic 

 coast from a few miles northwest of Washington, D. C, to Raleigh, 

 N. C. The only other known point of distribution is the type locality 

 in northern Indiana. 



Biological Notes. — Among the secretive species of Nemobius, this 

 species is at present one of the least known. We learn from Blatchley 

 that it was first found, "quite common in some low, damp woods 

 bordering Tippecanoe Lake .... living among the fallen leaves 

 and beneath small chunks and chips." No macropterous specimens 

 are known, but it is probable that a long-winged form of the present 

 species exists. 



Synony^ny. — It is strange that although Blatchley found this 

 insect plentiful when the type series was taken, he apparently secured 

 no males, but having taken males of N. maculatus in the same locality, 

 unfortunately supposed these to be males of the new species. 



