ii8 The Ohio Naturalist. [Vol. VII, No. 6, 



gray, usually an elongate blackish spot on the front side of each 

 femur and extreme apexes of all the tibiae and tarsal segments 

 blackish; otherwise legs red. Wings uniformly reddish yellow 

 all over, halteres pale yellow. Abdomen opaque black with a 

 narrow gray band in front of each incisure and in the front 

 margin of each of these bands there is on either side two or more 

 bristles. The reddish wings and legs taken together are char- 

 acteristic of the species. 



Length, 15 millimeters. Specimens from Douglas Count}^ 

 Kansas, taken in May and June by E. S. Tucker. 



Philonicus tuxpanganus Bellardi. Gibbosity of the face 

 small with few bristles wdiich are black above and white below; 

 face rather narrow and clothed with white pollen; antenna 

 black, first two segments w^ith black hair, second segment shorter 

 than the first, third segment slightly shorter than the other two 

 together. Arista much slenderer than the third segment and a 

 little shorter, palpi and proboscis black, beard white. Thorax 

 everywhere clothed with silvery pollen, above with two black 

 stripes near the middle of the dorsum and two spots of the same 

 color on either side, one before and the other behind the suture; 

 wings with a slight smoky tinge but this is so faint that they 

 well may be called hyaline and there is no apparent darkening 

 at the apex as in many species of the subfamily. Coxae silvery, 

 extreme bases of all the tibiae reddish, otherwise legs black with 

 black bristles; halteres pale throughout. Abdomen shining 

 black above with narrow white bands in front of the incisures; 

 in the front border of each white band there is on each side two 

 or more medium sized bristles, more prominent in the male than 

 the female ; venter of the abdomen silvery and with a few white 

 hairs. 



Length, 12-L5 millimeters. Taken at Gualan, Guatemala, 

 January 13, and at Mazatenango, Guatemala, February 3, 1905. 



WINTER KEY TO OHIO CHESTNUTS. 



S. B. Stowe. 



Castanea Adans. Trees or shrubs with furrowed bark and 



terete branches; twigs with rather prominent lenticels, not 



zigzag; leaf scars alternate; bundle scars several, scattered; 



stipular scars present; terminal bud present or wanting; axillarv 



buds sessile, single, with several exposed scales; pith small, solid 



more or less five-angled. 



1. Large trees; twigs glabrous and shining; outer bud scales glabrous. 



C. dcntata (Marsh.) Borkh, Chestnut. 

 1. Shrubs or small trees; twigs pubescent or puberulcnt, dull; outer bud 

 scales pubescent. C. piimila (L.) Mill. Chinquapin. 



