DIPTERA. — MUSCID&A. 565 
We have already seen that in respect to their transformations 
the Dolichopodes do not enter amongst the Muscidz, whilst the 
family Hamatomyides is as unnatural a group as could well be con- 
ceived. 
The arrangement of Robineau Desvoidy differs materially from 
that of Fallen, and is founded not only on the characters of the imago, 
but on the habits of the larva. It is as follows : — 
1. Calypterate. Chetum distincté 3-articulatum. Calypta (the alulets) majora. 
Nervus transversus cellule y C, semper manifestus. Corpus breve, gros- 
sum, nigrum, nigro-nitidum, nigro-ferrugineum. Larvae in fimetis, radicibus, 
cadaveribus, insectorumque larvis. éstrus, Echinomyia, Syphona, Ta- 
china, Ocyptera, Gymnosa, Myopa, Trichopoda, Xysta, Phasia, Dexia, Pro- 
sena, Stomoxys, Musca, Mesembrina, Achias, &c. 
2. Mesomyde. Chetum obscuré triarticulatum. Calypta jam minora. Nervus 
transversus cellule y C, haud manifestus. Corpus medium nigrum, nigro- 
griseum, nigro-cinereum. Larve in foliis, radicibus, stipitibus, et fungis. 
Anthomyia, Lispe, Drymeia, &c. &c. 
3. Malacosome. Chetum obscure triarticulatum. Calypta minima. Nervus 
transversus ut ad Mesomydas. Corpus oblongum, flavescens, flavum, flavo- 
pallidum. Larve in fungis, in putridis, stercoribus, inque plantarum me- 
dulla interiore. Thryeophora, Scatophaga, &c. 
4. Palomyde. Chetum szpius quasi inarticulatum. Calypta quasi nulla. Nervus 
transversus ut ad Mesomydas. Ale angustiores. Corpus oblongum necnon 
et filiforme, brunneo-flavescens, flavicans. Larve in plantis humidis, litto- 
ralibus, aquaticis. Loxocera, Sepedon, Tetanocera, Dyctia, &c. 
5. Phytomyde. Chetum quasi inarticulatum. Calypta nulla. Nervus transversus 
ut ad Mesomydas. Corpus politum, delicatulum, szepius filiforme, nigro-ni- 
tidum, nigro-flaveolum. Larve in plantis et fructibus interdum et in putridis. 
Oscinis, Calobata, Micropeza, &e. 
6. Aciphoree. Chetum quasi inarticulatum. Calypta utpote nulla. Nervus 
transversus ut ad Mesomydas. Ale solito variegate. Corpus mediocre ni- 
gro-pallidulum. Anus 2 solide stylatus et exterior. Larve in gallis corti- 
ealibus plantarum. Tephritis, &c. 
7. Napeelle. Chetum quasi inarticulatum tertio antenn. articulo sepius orbi- 
culato. Calypta nulla, Frons et facies seepius quadrate. Corpus parvum, 
atro-brunnicans. Lary in putridis vegetalium animaliumque. Ochthera, 
Spherocera, &c. 
8. Micromyde. Chetum simplex. Calypta quasi nulla. Nervus transversus cel- 
lule y C, nullus. Corpus parvum, brunneum, brunneo-flavum, flavum, flavo- 
pallidum, Terebra 9 interior. Larvz in floribus, seminibus, et in Erucis. 
(Not yet described in detail). 
9. Muciphoree. Chetum quasi inarticulatum. Calypta utpote nulla.  Nervus 
transversus cellule y C, nullus. Corpus parvum delicatum, flavescens, pal- 
lidulum. Larve in succis putridis vegetalium animaliumque. (The details 
of this stirps not yet published). 
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