114 
28. 
29. 
30. 
31. 
32. 
a2. 
34. 
a 
36. 
ore 
38. 
N. C. AGR. EXP. STA. BUL. 239 
Crown of head with black markings consisting of only four small spots 
hyalinatulus (Osborn) (fig. 95) 
Crown of head with black markings more extensive ................... 29 
Forewing without a transverse orange or yellow corial marking beyond 
apex of clavus, and without several orange areoles in a transverse 
QTOUP § .4n-<i0 eicin sear plainemean she ene Saiamo tl a agai lle 30 
Forewing with a transverse orange or yellow corial marking beyond apex 
of clavus, or with several orange areoles in a transverse group ...... Bo 
Forewing without longitudinal black vittae’"). ... -Si2.2i\ eee 31 
Forewing with longitudinal black vittae .....::..733))) eee 32 
Forewing with apical cells fumose, head with anterior margin broadly 
rounded IniOOrsal Vie wie & . atts ase obliquatulus (Jacobi) (fig. 96) 
Forewing with apical cells hyaline, head with anterior margin suban- 
gulateiin Gorsalyicwvew Je. 202. Oe syrphoidulus (Jacobi) (fig. 97) 
Posterior pronotal margin brown- or black-bordered .................. 33 
Posterior pronotal margin yellow-bordered’ -.... 32.22, .28e a) eee 34 
Crown and pronotum each with a transverse, broad, pale stripe 
knighti, n. sp., page 117 
Crown and pronotum without transverse. pale markings 
cynthia (Fowler) (fig. 99) 
Paraphyses with one of the rami branched; clypellus completely black 
errabundus, n. sp., page 123 
Paraphyses with both rami unbranched; clypellus pale at base 
nigrovenosus, N. sp., page 119 
Style extending posteriorly not as far as, or only slightly farther than 
apex of connective (fig. 102e) or with lobe occurring opposite base of 
connective (fig. 103¢) .00.000....0..0. 2799. 2 2. 36 
Style extending posteriorly distinctly farther than apex of connective 
(figs. 108e and 109e) and/or with lobe anteapical ................... 37 
Forewing with paired orange areoles opposite scutellum separated from 
each other only by width of claval suture, the areoles angular; para- 
physes not branched; discal transverse dark band of pronotum usually 
TLIO pee es ORR ee es eee bracteatulus (Jacobi) (fig. 102) 
Forewing with paired orange areoles opposite scutellum more widely 
separated, rounded; paraphysis branched apically; discal transverse 
dark band of pronotum interrupted ......... jemima (Distant) (fig. 103) 
Paraphysis curved dorsally, thence apically, unbranched or with a small 
STILeAD ICAL STARCH «cca ak uct em .... fastuosus (Fabricius) (fig. 104) 
Paraphysis or paraphyses not as above ............. sae sn eee 38 
Forewing, pronotum and scutellum with at least some maroon markings 
chiriquensis (Fowler) (fig. 105) 
Without maroon markings ....... 2... 065 000145530 40600 39 
