68 
22. 
23. 
24. 
25. 
26. 
27. 
28. 
THE NORTH AMERICAN SPECIES OF DROSOPHILA. 
First coxa dark brown below; dark abdominal bands with pale spots on lateral 
BANEATPPATA BS 209 cay ui hig tices ent VANS Sa I a ce art repleta (p. 99) 
First coxa pale below; pale lateral spots on abdominal segments present. 
mulleri (p. 101) 
First coxa pale below; no lateral pale spots on dark abdominal bands... hydei (p. 101) 
Costal index about 1.0; fourth-vein index about 5.5; pleurze with a dark stripe 
BIO VC ee iat hie ia Sesoae es Graal 5 ate hay wis AA cu atc Oe NER See quadrata (p. 76) 
Costal index 2.0 or over; fourth-vein index less than 3.0; no pleural stripe...... 24 
Blackish species, not at all reddish or yellowish.......................000005. 25 
Vellow; cor rec hishy jy Oven cis aio ieles oun nth Aelia les nape alee ea, ee sen ese 26 
Costal index about 4.0; 2.5 mm. long; no combs on tarsi............. robusta (p. 96) 
Costal index about 2.7; 2 mm. long; a comb of short, stout bristles on each of the 
two basal tarsal joints of the first legs of the male.............. obscura (p. 93) 
Costal index less than 3.0; fourth-vein index about 2.3; the male has a comb of 
short, stout bristles on the basal tarsal joint of the first leg................ 27 
Costal index over 3.5; fourth-vein index less than 1.5; no tarsal combs......... 28 
Genital arch of the male with a hook-like posterior process (fig. 13); cheeks 
FELAEIVeLy ATO Wy (ey AS) ore eh e Akne e et eh NO Lae ena melanogaster (p. 89) 
Genital arch of the male with a clam-shell-like posterior process (fig. 14); cheeks 
broad erie AB yrs ees dee ak sare fay wee amr sar nN SUN DEAL R SR simulans (p. 91) 
Dull yellow, not at all reddish; a row of very short, stout bristles on lower apical 
part of front femur; wings slightly clouded on posterior cross-vein and tips of 
Second) and GIN Vela > 6 ois). ines akenaia ie PT eee ae immigrans (p. 83) 
Reddish brown; no combs on femora; wings clear, or occasionally slightly clouded 
ON. DOShETION COBS=VOUN! 5 270), Me hh al eis Sie Bey ied Sete ah eee funebris (p. 84) 
NEOTROPICAL SPECIES OF DROSOPHILA. 
1. Wings distinctly spotted or clouded other than narrowly along the veins........ 2 
Wings clear, or clouded along veins, or spotted along veins but not on blade..... 7 
2. About ten acrostichal rows; a single pair of dorsocentrals. .. . . superba (p. ec 
Six acrostichal rows; two pairs’ of dorsocentrals. 2... 25. 2. hanes eee 
3: Prescutellar bristles distinct pristles DrOWR. S05... ent bere se 2 ea ce ; 
iPrescutcuars not atieremtiated 2.5". wit 2 se Seem ae ene larg Sued a cee em 5 
4. Costal index over 3.0; posterior cross-vein sinuate...................... jlexa (p. 71) 
Wonbalindexnndenis On 6 ok hiss coe cae eae ae, a ues he aan oT paradoxa (p. 72) 
5. Two large oral bristles; wings entirely smoky; fourth-vein index 2.0 or over. 
nebulosa (p. _ 
First oral over twice second; wings spotted; fourth-vein index under 2.0....... 
GoPAVSDOUIBCuGID Olay LOR ek tees nen kenere mica ites Greene crane Ok cpa vittatifrons (p. oar 
Wings spotted also'on basal'portion’. 220. 0. Se ec ne cee ome calloptera (p. 103) 
[SS eh LIST SMa are 4 Slain eatin A a ae PG EN DPR calloptera ornatipennis (p. 104) 
7. Mesonotum velvety black; four acrostichal rows....................opaca (p. 104) 
Mesonotamnot welvety Diack.) 6c ho csccn os sete ie eye an Lane aie cea ears eee 
8. Face white; six acrostichal rows; carina large; mesonotum yellowish........... 9 
DE CCPeM0C0) Hid 1 Cee a at TN A a eg a CORY ANT IA eam aa Uches 10 
OO BTrOnt VENOW. AOGONIET DANCE jo occ ee is chee ce bine eee pee ease albirostris (p. 78) 
rant, prowl \apdomen blacks) ek in ees ee VN oe Spee a pe metzit Ae e 
10. Carina absent, or small and confined to upper part of face........... 
Garinig mresenPrGlow cee ee ee ek set MANE UE aE nn Sue OT ee is 
11. Mesonotum yellow in front and on sides, shading into metallic bluish black in 
oaULO KCI Ket oYe eon aLG beac a ausinate tata PeANN HD IDaIe eaten! Sn py NERA aa A a metallica (p. 
Mesonotum more or legs definitely striped .).0 foe ee ences se ele ems 
Mesonotumtimmarked, ‘ehining blacks oc cake eats cies es) ctee, he = 
Mesonotum unmarked: ‘yellow or/browat 0.) 2/5 (oa 2 hone oo ao lease Siemens 14 
12. One prominent oral bristle; third antennal joint long, yellow, hairy...prognatha (p. 75) 
Two prominent oral bristles; third antennal joint as ‘usual. 
(pulchella—see below, under 22) 
fa ocubellamshimingb lacks Avi Na eerie Giens me are Gk Ueki ans Scene dubia (p. 73) 
Scutellum velvety Diathwes samt et eoln snus 2a OAC caer Paine ta splendida (p. 73) 
polar (274 (2 UBD a ab A VP seh Se Oa be TEMAS GAD aA 6 splendida luteipes (p. 74) 
