204 The Ohio Naturalisf. [Vol. II, No. 4, 



head -when out-turned ; palpi reaching slightly bcN'ond border of head ; 

 antennae minute, antennal cavities marked by distinct brown borders ; ocular 

 fleck conspicuous; occipital angles produced and with a distinct hook. 

 There are two minute hairs on the border in front of antennal pit, three just 

 behind ocular fleck and two longer bristles between fleck and occipital angle 

 about equidistant from each other — the fleck and the angle. Thorax broader 

 than long, rather deeply concave in front and shallowly concave behind, the 

 lateral angles prominent and with a bristle and two minute hairs ; postero- 

 lateral angles rounded, with l^ristle and one minute hair. Metathorax with 

 about four minute hairs on lateral border, anter orh- two long bristles on 

 postero-lateral border. Abdominal segments with brown marginal stripe 

 narrowing on eighth segment ; a light brownish discal area extending from 

 Ijase to near the tip and covering about half the width of the segments. 



This species agrees in coloration with cliffusiim ^•ar. pallidum 

 Kellogg, bt;t is much smaller than his measurements for diffusum, 

 and the distinct hook of occipital angle would seem to separate it 

 from that form. From sucinaceum, which it resembles in size, 

 it is distinguished at once by the narrower front of head, different 

 .shape of occipital angles and number of bristles and the marginal 

 abdominal bands. 



Described from three specimens, females, two from the Oregon 

 junco, Junco hyemalis oregonus, Ft. Collins, Colorado, collected 

 by A. C. Stephenson, and one from Junco aikeni, Ft. Robinson, 

 Neb., from Prof. L,awrence Brtmer. It woitld seem probable that 

 this form and Kellogg' s diffusum var. pallidum must be clo.sel\^ 

 related, but .so far as present specimens go they seem quite 

 distinct. 



It is .somewhat remarkable that in this genus nearly all descrip- 

 tions have been from females only ; only four species, so far as I 

 have noted, referring to males, a fact that would seem to indicate 

 that the males are quite rare or manage to escape qtiickly from 

 dead birds, though the females also are usually' taken in l)ut small 

 numbers. 



Physostomum diffusum Kellogg. 



Kellogg has described this species from specimens taken from 

 the Sandwich sparrow, Antmodramus sandwichcnsis, and the 

 golden-crowned sparrow, Zonotrichia coronata. 



vSpecimens evidently belonging here have been .sent me by Prof. 

 Hruner, taken, one female from the Lincoln sparrow, Melospiza 

 lincolni, Lincoln, Nebraska, and one female and one male from 

 the Savanna sparrow, Ammodramus sandwichcnsis savanna, Lin- 

 coln, Nebraska. The male is .smaller than the female, 3 mm. 

 long, and is lighter colored, the alxlomen clear white or trans- 

 ])arent, the genital fork inconspicuous faint brown, the ends of 

 the prong broad and rounded, a more distinct brown, crescent- 

 shaped genital ring. 



