LIST OF ILLUSTRATIONS. 
SEVEN NEW SPECIES OF FISH OF THE ORDER MALACOPTERYGIL. 
By W. W. Welsh. 
Diplepnosimooner.. NOW BPOCIeS. = . .2. 5.5 Seer erie ans ina e526 ca aaa es on ok 
& Artslostontids lULMGTNY TOW SPOCIOS: 2c) eae a elon ooo iain crate oan soon 
2 EMSLOMAGS PrOLIMUST NEW ISDOCIOS 22 = 4-106 aioe a eta cn w aie i dz) ajnin Shoo mice cia 
5. JUSLOM UGS PrOTUNUS. CUplOL DATEL... 0! 2 teemicteeic eis bid ics & ais sms n/niaiaie ee 
BE eSLOMAAS. DIGELOIN ACW SPCCIOS=... 2. ico Hae eas ad a ois Sic ocln nea ea ee 
LHPuaLOMeas DIge Oly. tip OlsDarbel s...022. 2 Scene See ase se Se kee an ce Seles 
. senistonias en barbatus, MEW ISPeCes! fo) . SPSS Sj eis | SSI 5 OO DISSE: 
seeusronuas envarvdrus. tip Or barbel: ¢ 7.20: Gee Wee oie es 
SRC LOSLOMMIGS CIGhtalits, TOW BPOCless 222 cele oe ente oa 2 es cera aisle cinle we 
; Arechostomias wictallicus, NeW SPEClORs.. to. acsawte sh <-melh al ated. atee ss 
SCOnnor | DH 
eS 
THEREVIDAE. 
By Frank R. Cole. 
1. Mouth parts of Dialineura crassicornis Williston. A. Outer mouth parts 
(Distiproboscis and mediproboscis, with palpi and galea). B. Inner 
mouth parts (hypopharynx, epipharynx, basipharynx, esophagal pump, 
etc.). m, Membrane; mpr, mediproboscis; th, thickening; the, theca; ps., 
pseudotrachea; dpr, distiproboscis; g, galea; st, stipes; mx. pl., maxillary 
palpus; fr. c., fronto-clypeus; cu, cornu; oe. p., esophagal pump; to, 
torma; bph, basipharynx; s. b., salivary bulb; l. ep, labrum epipharynx; 
OR LER GATOS 0) oC ting 1b. Gaeeeeee eee eo eta CRT ae eee ae nee Sr PC OA co aaa ae Pee 
2. Male genitalia. A. Dorsal view of apex of abdomen of Psilocephala frontalis. 
B. Internal-genital organs of same. C. Ninth sternite of P. frontalis. 
D. Internal genital organs of Psilocephala haemorrhoidalis. E. Ninth 
Blermite oles LAemOorrloLraaus. seen ky ane Soe. Le ee ees Soe CEE 
3. Male genitalia. A. Apical segments of Dialineura crassicornis. B. Ven- 
tral view of same. C. Internal genital organs of D. crassicornis. D. 
Dorsal view of male genitalia of Thereva vialis. E. Internal genitalia of 
same, hisher maenificationa. asteeehs) 15.2gctes wienbs danas wets 
A NEW FOSSIL TURTLE, KINOSTERNON ARIZONENSE, FROM ARIZONA. 
By Charles W. Gilmore. 
1. Carapace of Kinosternon arizonense. No. 10463, U.S.N.M. Type, male. 
C. 1, C. 8, Costal bones 1 and 8; N, 1, 2, 3, 4, 5, 6, neural bones 1 to 6; Nu. 
nuchal bone; per 10, tenth peripheral bone; py, pygal bone; spy, supra- 
pygal bone; VJ, V5, vertebral scutes 1 and 5. One half natural size... -. 
2. Carapace of Kinosternon arizonense. No. 10462, U.S.N.M. Paratype. 
Female. C.1, C. 8, costal bones land 8; JN, 1, 2, 3, 4, 5, 6, neural bones 1 
to 6; Nu. nuchalbone; per 10, tenth peripheral bone; py, pygal bone; spy, 
suprapygal bone; VJ, V5, vertebral scutes 1to5. One-half natural size. 
3. Carapace of Kinosternum arizonense. No. 10463, U.S.N.M. Type, male. 
Viewed from the left side. One-half natural size..............--.------ 
4. Carapace of Kinosternon arizonense. No. 10462, U.S.N.M. Paratype. 
Female, viewed from the left side. One-half natural size............... 
5. Plastral view of carapace of Kinosternon arizonense. No. 10463, U.S.N.M. 
Type, male. Ab, abdominal scute; an, anal scute; fem. femoral scute; 
hyo, hyoplastral bone; Hypo, hypoplastral bone; ziph, xiphiplastral 
Done wm One-nall naturalness. Seats eat ese ee ee eat Coes cess se 
me ood nr D> oor w to 
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REVISION OF THE NortTH AMERICAN TWO-WINGED FLIES OF THE FAMILY 
