or 
SYSTEMATIC ACCOUNT. 67 
Nerarctic Species oF DROSOPHILA. 
. Acrostichal hairs, just in front of dorsocentral bristles, in six rows. ...........---. 2 
NOTOSCICHAL MANES TE OMEN TOW rc steals sale accra'e costco let tiee aya leile prance oddog a helerg ate e ares 20 
. Facial carina very small, absent or very narrow below; second oral bristle not 
CUM OR PULI CHE LES Us A cy scare chain or eclar lorale Solera set meted a/aire rates mleereasaphn leis oss vale 3 
AEN E HOT REN NCIC Un erate Erte unre tior teh rete far asa eke cee we neeelcre a ataMule, pie ay aah e ee 5 
. Yellow; third antennal joint large, with long yellow hairs; fourth-vein index 
CobaYa Fev ope OP Palla tat Bie at anf cA Ai el I cn RS aC MR LN HE duncani (p. 
Blackish; third antennal joint as usual; fourth-vein index over 2.0............ 
. Costal index 3.0 or over; a comb of stout black bristles on inner side of basitarsal 
HOMME Op tinsh leo. et iialery i oye ae cle cla eet ie es oo eithha amar eteleretene affinis (p. 94) 
Costaliindeximder 2:5? “no tarsalicomib 3000. 2 oes oe ase oie alabamensis (p. 102) 
. Wings with about thirteen small dark spots along veins; mesonotum yellow, 
striped with reddish brown; first two to four oral bristles nearly equal. 
guttifera (p. 103) 
Wings much clouded; posterior cross-vein sinuate; small prescutellars present. 
sigmoides (p. 70) 
Wings clear, or slightly clouded along cross-veins or tips of longitudinal Veins eves se 
. A pair of presutural acrostichal bristles present; yellowish-brown species. 
putrida (p. 81) 
DNC MBSSILUTA REPOStTCHAIS 4/5, 01 ch Dee tere a ad a ae ere ote a ict ) afte taste lobe ateaay er sak if 
7. Second orbital about half length of first; only one large oral bristle; yellow species; 
Deg Mana lation are (tote a GEE Rs ete Tepe aN etn he ie ordinaria (p. 86) 
Second oroitalliless than’ half lengthvot first): 2.) deed os aloe pee le ste a 8 
8. Costal index not more than 2.1; Neotropical species, found in southern Florida... 9 
Wostalindex mot tess tam o2eh 2 J). toe cuatera a sto hetalis nh eaters onl «ha! Sa, auahe) aie: cual abalatevere « 10 
9. Reddish-brown species; bristles and branches of arista short; lives in flowers. 
lutzit (p. 74) 
Yellow; bristles and arista as usual; lives in fruit................. willistoni (p. 89) 
10. Ground-color of mesonotum blackish or grayish, not at all yellowish...........- by 
Ground-color of mesonotum yellow, or reddish brown............-..-..+0++0-5 16 
11. Second oral bristle over half length of first; fourth-vein index about 1.8........ 12 
Seponucorall less thar inelt first) 00-8 Fae ye diainos oie es ove change cates let tel aevelel aia aheeS aye sel ec 13 
12. Carina broad; costal index about 3.0; 2.7 mm. long................. virilis (p. 97) 
Carina narrow; costal index about 4.0; 1.5 mm. long........ pseudomelanica (p. 94) 
13. Carina distinctly suleate; mesonotum grayish pollinose, irregularly marked with 
reddish brown om. lOmp aL eat on NS kh Sk sulcata (p. 96) 
BNO aS OC NOT tt cat eben aba) Fy wee aN MP AE eal yk MGI aE a A be tate 14 
i4csbirst. cox: black below > 2:5)mm. long v2 kas ol fe poe he leer OG see robusta, below 
Birst cox browses mre Ones eS I NL Mag oe alah ocean NI Sunt te the il acaent 15 
18. 
19. 
20. 
21. 
. Mesonotum blackish brown; ‘‘ cheek ”’ one-sixth greatest diameter of eye. 
melanica (p. 95) 
Mesonotum brownish black; ‘“ cheek ’’ one-third diameter of eye. melanissima (p. 95) 
. Wings clear; abdomen banded; only one large oral bristle......... melanderi (p. 82) 
At least posterior cross-vein slightly Fe ETLE(G (25 GLASS DD a DA EP MOM OMe DEA ete AG 17 
. Reddish yellow; abdomen banded; Neotropical species found in southern Florida. 
cardint (p. 78) 
Retiany VIG UIPECCIS Redes ae oie u cued aya Chula eg a LUN dod ci lasieg clam eh aite lala fe 18 
Abdomen with interrupted posterior dark band on each of first four segments, 
and a median anterior spot on third, fourth, and fifth segments. 
tripunctata (p. 82) 
Abdomen spotted, but without median spots... ...........-.- scene reece eee 19 
Dull yellow; tips of longitudinal veins not clouded............... transversa (p. 81) 
Shining yellow; tips of second, third, and fourth veins clouded...... quinaria (p. 80) 
Carina minute; small prescutellars present; wings much clouded ..... inversa (p. 71) 
Carina not minute; prescutellars not clearly differentiated; wings clear or with 
Seas EhOMAS PONE ONS Hole e Wart ae niecalt) Soule al a, dia late/oheha late alafdlelAials ete aleig teeceie « 21 
Mesonotum yellow, with distinct blackish longitudinal stripes; second orbital 
HEATLY AMV ee AS HAUG ae) toa css veg ois is cinyelale wo Rlovealtbe voahd olalalalas busckit (p. 77) 
Mesonotum light gray, with numerous dark-brown spots; carina sulcate........ 22 
NTeSON GUNA MOU CISIINCLLY: MIA KEG )!) ice. 2 are 'e\e ove Uinicig)s aie ee rope sie sieve pie ste ecsce 23 
