132 Psyche [August 
5. Mystax mostly white; male appendages not much narrowed nor bent down 
ab tip 2e. feckless ot side CRO aon eee Aes hE eee eee novescotie. 
Mystax whitish or yellowish below, black above; male appendages more 
cunved andenarrowed sat (lipsemsener eer ee ee Pao autumnalis. 
Of Leptogaster I have taken most of the Eastern species, and in 
going over these I am inclined to keep flavipes and favillaceus as 
separate, at least as varieties, and would describe a new species. 
As in Asilus I think the color characters are here more valuable 
than some structural ones, at least more useful than venation. 
1. No empodia; hind femora with band before broadest part; hind tibz with banP 
at base and at middle dark; thorax pale; antenne yellow........ annulatus. 
Empodiatpresent2s: ectera. & orice etic miner oe nie MR ee ae eee 2 
2. Hind tibiz dark only at extreme tip; hind femur usually not plainly banded. .7 
Hind tibie dark for a considerable distance; hind femur dark or dark- 
Jot W5C0 (200 Bees Ape ae oie ieee re eee aah Nei Spear clin SoCo - 3 
3. Legs mostly black; antennz dark; hind legs very slender............. tenutpes. 
Legs wnostly paleo. f.52 ands nx Oe 8 oe Ce See + 
4. Dorsum of thorax wholly shining black; hind femora with apical dark band, 
and another over the beginning of the swelling............... atridorsalis. 
Dorsuminot whollyzshining blacks jes440-o- pears eee Lee eee BeO 
5. Thorax with three black stripes; hind femora with band over thickened part; 
ANIENN MALE tole % crys essc.c ss 6a Fleer nel eedraa) ee ie eS eevee eotegen rege virgatus. 
Thoraxswithout;suchastripes® = sic2 7 ee eee eee eee eee 6 
6. Antenne dark; hind legs short, and the swelling greater than usual, and coy- 
ered by broad band, the dark of hind tibie undivided............. pictipes. 
Antenne yellow; hind legs longer, the dark band on hind femora not so 
broad; the dark of hind tibize divided by pale.....-.......... brevicornis. 
7. Thoracic notum polished reddish, often a black spot behind on each side; hind 
femorawithiaismallidark, bands. 4-42 ee oea eee Ore eee eee eee 8. 
MThoracienotuminot polished'reddishGa spss eer re ane ee eee 9 
8: Body. mostly, ted diss: 9.2).4 a5 5 2 hee ee eee oe eee ee testaceus. 
Body mostlyadarkand with pale marks): oes eeee ae oe ee badius. 
9. Abdomen yellow on basal part, only dark over the incisures...... incisuralis. 
Abdomen: with muchumore darks see oeeeee eee ee eee eee Lee 10: 
10. Abdominal segments dark, pale only near apex; hind femora show a faint dark 
marks bristles of thorax. iblackseeees eer aecre rere eae eee loewi. 
Abdominal segments with pale before middle on third, fourth and fifth seg- 
MIG See ene Pee See. baci atato sion aaa aske Gobo US ll 
11. Lower anterior bristle of the two thoracic ones pale, larger species with duller 
MAK eevee es, at ais tie bo aed ed Re ee ee eee favillaceus. 
Both thoracic bristles dark, marks on abdomen strongly contrasting. .. . flavipes. 
L. virgatus Coq. probably is L. carolinensis. L. incisuralis Loew 
probably is L. ochraceus. 
