1921} | Dietz: Impudica Group of Tipula 43 
stem of cell M! scarcely more than one-third the length of the 
cell. The setigerous punctures (Trans. Am. Ent. SOC. ;: Sele 
‘p. 107), are especially marked on veins R, Cu, Cu! and A?, 
Halters pale, knob dark fuscous. 4 
The species are of medium to fairly large size, except 
dimidiata, which is a small fly. As far as known to me, they 
are all inhabitants of the Pacific slope. 
KEY TO THE SPECIES. 
obtuse and not compressed Hate payer endo es ott a eee oe nea 2 
Eighth sternite without such a process. The subtergal process long, 
2. Process of eighth sternite elongate; pointed: ly. .r 48 pyramis Doane 
The process'sktorter, rounded. 3/7/1205.) rahe St Aca Sorte Poe dag 8 pellucida Doane 
3. Lower apical appendages of hypopygium long, lanceolate, conspicuously 
diversa spec. n 
WarucobbusenoCP let iy Wass 11D) averse hale ins )itL okt tnt lyrifera spec. n 
5. The ninth tergite produced in the muddle; (Pl: ligcRig 3) 6 x. er madina sp. n 
The ninth tergite deeply and distinctly incised in the middle............ 6 
6. Pleurites subtruncate, or cMlareinate "a DOVieTaay. Cais ook Ree ee 7 
Pleurites obtusely pointed above.......................... mutrata spec. n 
7. Incision of ninth tergite broadly U-shamedis eye te) ih eck aaah: Men vata 8 
Incision narrow, sub-parallel, or V-shaped.....................0000 9 
8. Canthi of the incision acutely pointed (PIT. Big) O)o 3. 28 sinistra spec. n 
Canthi obtuse, subangulate, (PI. I, Bigeye Pei ayte eee ater spernata spec. n 
9. Incision deep, narrow, sub-parallel; canthi prominent, acute, (Pl. I, 
LOS CON Rg ARPA SR gc eine 2 a ny ea ee spaldingi spec. n. 
Incision V-shaped, canthi prominent...............------s.....0..... 10 
10. Canthi obliquely truncate, slightly emarginate, (Pl. I, Fig. 6b), 
impudica Doane 
Canthi very acute, (Pl. I, EASTON omaha reaeteoete ce ert dimidiata spec. n. 
AUXILIARY KEY TO THE SPECIES. 
1. Costal) wing-margin’ fuscous. 0.0.02... 25. oe. eecee nce. pellucida Doane 
Notas mbtnev al tenia iver Actin, iit. 2 oh cies trick hale ak a ee te 2 
Pepe Cron Wang coneolarousii : Cate... fon. owt tae. in tha tee 3 
UNC Beatie Fon Cave lowictin | shit he ee cline tabi wiley ot iatme al kes 8 
3. Cu. and its branches MMe MMe With: PASCOUS. Ai nbh ehh ese ck tlie Seren 4 
Nop asm che alters teen: yelp egrcl IRAE A Sapien ei i Cs 5 
4. Thorax grayish; the antestigmal spot extends into cell Cul. .diversa spec. n. 
Thorax dark yellow; the antestigmal spot does not extend into cell Cul, 
spermata spec. n. 
ERT ORTRTS NS ol DOT Ua aaa | 0.6 coh) AR Sa EOP Spaldingi spec. n. 
COLO SIEGES ISOS, Summits 5), 8 ate Soh aa eure a Oe a aR 6 
6. Antestigmal spot small, does not extend beyond R. s.; small form, 
ei stsne habtaias cell Vsti ec. op eee uathere gd ke 7 
7. The dorsal abdominal stripe extends uninterruptedly upon the sixth 
WW OUEIUES od SS em GR PRNBE eA 5 SENG Conia eae on a la aa madina spec. n. 
Notaseaimealiemativen smu: ee wis ots th mutrata spec. n. 
*Generally Cell C is paler yellow than Cell S. c.; very pale in some species. 
