Sr 
346 
Krys TO GENERA 
LARVAE AND PUPARIA 
Anal respiratory processes thread-like, one of them at least ten times as 
long as body, coiled inside of body of host; both larva and’ puparium 
internal in host (Icerya purchasi)............++ Cryptochaetum Rondani 
Anal respiratory processes very short and stout, sometimes sessile, not 
thread-like, and not as long as body; larva and puparium not internal 
ED (HOStie:svatelosetclatateter cis eictetsletaistarstatate ate: cieiaiaveks Lek Mua (Leucopis, sens. lat.) 2 
Body almost cylindrical, not tapered posteriorly, with minute warty or 
setulose armature; anal respiratory processes sessile, situated much above 
level of venter and widely separated. Host, Pulvinaria vitis L......... 
SP TOOTS O GO AOL De CO ae oe SOOROL Leucopomyia, subgen. n. 
Body distinctly flattened ventrally, tapered both anteriorly and posteriorly, 
usually with minute warty or setulose armature; anal respiratory proc- 
esses stalked, usually lying close against the surface to which the 
larva or puparium is adhering.............. Leucopis Meigen, sens. str. 
IMAGINES 
Orbits with one or more pairs of distinct bristles...................+- Aer 
Orbits’ swithowt Dristles cs = sie fee, w <le nse! aie al =) ae'e e whe fosa er chase fenaialejayelouei=taisl ate 4 
Head pointed at base of antennae, the face almost horizontal; wings dis- 
SACI CE ygS DOLLS apa rete tote ele eyere peter tel ee totetoeta sole ror- tenets Acrometopia Schiner 
Head not pointed at base of antennae, face short and nearly or quite ver- 
tical (Pl. XLVI, Fig. 5, 6, 9, 10); wings unspotted................+2.4- 3 
Thoracic dorsum with four pairs of bristles (Pl. XLVI, Fig. 2); mesopleura 
bare; ocellar bristles absent............0-.eeeeeeaee Chamaemyia Panzer 
Thoracic dorsum with three pairs of bristles (Pl. XLVI, Fig. 1) ; mesopleura 
bare; ocellar bristles present................500+00e- Ochthiphila Fallen 
Thoracic dorsum with two pairs of bristles (Pl. XLVI, Fig. 3); mesopleura 
with one strong bristle; ocellar bristles present but weak............. 
eievatahet agers sje tauneciaiohat ste ein lay Sea a teeny Ree ENE a Teh ee apes Pseudodinia Coquillett 
 ATIsta sabsent)v.dcas aatne Acoso coke es Cryptochaetum Rondani 
ATIsStS,  DTESOM Gi oii. fo din acc cccieianatereie! eisce. Veloce aiehe Mlaiaoal aseie caiman: Atha) avatars eve reve het otal eeanae 5 
Costa with small setulae on under surface; species glossy blue-black...... 
Re te Mca EO Oe Coho ie tune Dec eed Gen ene trctec ets Paraleucopis Malloch 
Costa not setulose; species densely gray pruinescent..... Leucopis Meigen 
ACROMETOPIA Schiner 
The only described North American species of this genus, punctata 
Coquillett, has been recorded only from Georgia. 
Larval habits unknown. 
