ART. 4. REVISION OF THE FAMILY THEREVIDAE—COLE. 35 
wi 
8. 
10. 
12. 
13. 
14. 
15. 
16. 
Hee 
18. 
19. 
20. 
21. 
22. 
23. 
24, 
Halteres black. . Uh TEARS TLL 1k RR 2 ORY Vee odd tn OL Be 
Halteres yellow 513. 
Genitalia with ae clumps of black jonistied.c on “the fay pandriten, ‘the rest’ af the 
pile of the genitalia pale; frons with a wide median shining black patch. 
frontalis, new species. 
Pile of genitalia mostly black; no conspicuous bristles on the tips of the plates 
of the hypandrium; frons with a narrow wedge of shining black. 
haemorrhoidalis (Macquart). 
Genitalic and iimone not a5, Gescribede.. cnc ste peeled aia a arseyesk edardd fue 
First two antennal joints yellowish................. arizonensis, new species. 
First two antennal joints black . a! I RL RR KD 
Costal cell blackish brown, the rost ‘of fen wing by aline eet “costalis Loew. 
Costal cell hyaline or slightly infuscated . cai seas apes Bag a coun dh, 
. Mesonotum vittate; femora yellowish coe ere Ae oe Gijicderann). 
Mesonotum dull-gray poneoee. beaeiss on the margins; legs almost wholly 
black . cyt Basan etre) 1a. 
Legs orale entirely black, as are wes halteres: aes with t a das discal spot. 
signatipennis, new species. 
Bases of tibiae reddish; no definite discal spot................ platancala Loew. 
Halteres brownish lie mesonotum and scutellum with golden tomentumlike 
pile... SNe emer ad ean 'an aon oe DAVEDENNIS, New SPECLES: 
Halteres bright ae BE eats pe ORR eee a ley PEO Leos CNN. gl Ee 
Mesonotum somewhat rare 1 whitish vittate; stigma and wing veins 
very pale yellow........-- -.--..--.- laerigata Loew; aldrichi Coquillett. 
Mesonotum and eeetetler | eee er Pallcce except sides, which are 
ALINE 5. 2024+ oo lateralis, Adama, 
Hypopygium ieee nee bee con M-3 iatesed. frons pare and silvery pol- 
lintose &.,.'-;..,. Sete Set eyo nto RS oe Ws 
aire tn act, large and Sei A al eo os BS hyo eee 4G. 
Eyes separated by the width of the ocellar ances cell M-3 =a es 
- latifrons, new species. 
Eyes holoptic, or nearly so........ Pe ee ee ee ee oe me O78 
Knob of the halteres yellow ene va BS OE RP eee at 
Knob of the Peet Cet eee ee ae 25. 
Henvara, Vellowisht. seo tosis oe. S'S oon Ge aeo nie Sa eeeee on tor eyet pean Os 
Femora black . See Eo eA es thy clans a Ne Ale 
Thorax and abdomen eellow ee Salt "occipitalis Adams, 
Thorax and abdomen black, abdomen silvery white pollinose. 
montivaga Coquillett. 
Second, third, and fourth abdominal segments shining reddish. 
aurantiaca Coquillett. 
Abdomen not colored thus, usually black and pollinose....... : 21. 
Large western species; gray pollinose; igs large; apex of knob of halteres 
whitish J) i eee PT eae ee elimataCoquillett. 
Smaller and usually m more e slender species... a3 re J022. 
Abdomen largely yellow in ground color; third antennal joint and its style Very 
slender. see Bains cn apiipareok SURE . festina Coquillett. 
Abdomen black i in | ground color. ale ths a hie 23. 
Heavy bodied species, about 9 mm. in length; genitalia black i in ground color; 
Linen Olam aLGs eo See cs ook neue ne eee ee ee pollinosa, new species. 
Much smaller species; genitalia yellowish. ...........----------- eee eee 24. 
Erect pile on mesonotum rather long; upper corner of frontal triangle blackish. 
cinerea, new species. 
Pile of mesonotum short; upper corner of frontal triangle brown pollinose. 
morata Coquillett. 
60466—23—Proc.N .M.vol.62-——16 
