216 INSECTA SAUNDERSTANA, 
Fam. MEGACEPHALI, Meigen. 
Genus PIPUNCULUS, Latr. 
Piruncuus LATERALIS, Mas. 
Niger, canescens, abdominis lateribus cano maculatis, antennis pedibusque 
Sulvis, femoribus serratis, alis limpidis. 
Nearly allied to P. flavipes. Black, shining: head and breast adorned 
with hoary bloom: feelers tawny : abdomen hoary at the base and with a 
row of irregular hoary spots along each side ; tip tawny : legs tawny; thighs - 
serrated beneath for half the length from the tips, the teeth black and very 
small ; tips of the feet pitchy; tips of the claws black: wings colourless ; 
wing-ribs tawny ; veins black, tawny at the base; poisers tawny.. Length 
of the body 2 lines; of the wings 5 lines. 
North America. 
Fam. SYRPHICI, Latr. 
Genus MICRODON, Tiliger. 
Micropon Trocutinus, Fem. 
Cyanco-viride, purpureo aureoque varium, abdomine cupreo, ventris apice 
fulvo, antennis nigris, pedibus purpureo-cyaneis, alis subcinereis ad 
costam subfuscis. 
Bright bluish green : head clothed above with black hairs and more 
thickly in front with pale yellow hairs: eyes red; all the facets very small : 
mouth pitchy; feelers black ; bristle pitchy: chest and abdomen clothed 
with pale yellow hairs: a purple spot at the base of each wing; scutcheon 
and hind-chest tinged with purple : dish of the chest golden green: abdo- 
men bright coppery, golden towards the base which is bluish green ; under- 
side towards the tip tawny which hue is divided from the green by a ferru- 
ginous segment tinged with purple : legs purplish blue, thickly clothed with 
short black hairs ; shanks and feet tawny towards the tips beneath; claws 
and foot-cushions bright tawny; tips of the claws black: wings slightly 
gray, pale brown along the fore border ; wing-ribs, veins, and poisers pitchy. 
Length of the body 5% lines; of the wings 11 lines. 
Mexico. 
