INSECTS. 
54j 
Tabanus tropicus. — The Tropical Tap an us. 
Plate Cl. fig. 7. 
Mouth with a membranaceous proboscis; two equal lips; 
haustellum projecting and received into a groove ; antennae short, 
approximate and cylindrical, with seven articulations; of a dull 
brown and yellow colour. Inhabits Britain. 
TRIBE III.-NOTACANTHA. 
Sucker of two pieces; rostrum in most species membranous, 
short and concealed, except its two large terminal lips; in 
others it is long, slender and syphon-shaped, hidden by a beak 
supporting the antennae, of which the joint is divided into many 
aunulations varying in form and length; wings resting on the 
body ; and having a central radiated areola. 
Genus STRATIOMYS.— Geojfroy. 
Generic Character. — Sucker never having more than two 
set®, enveloped in a short, retractile doubly lobate, and mem¬ 
branaceous sheath ; antennae consisting of three principal pieces, 
longer than the head, the second and third pieces forming a 
compressed fusiform body of six joints, and pointed at the end, 
with style or seta; head round ; thorax cylindrical; scutellum 
with two points; wings long, resting upon each other; abdomen 
dilated in tlie middle; tarsi with three balls. 
Stratiomys chamceleon .— The Chameleon Fly. 
Plate Cl. fig. 8. 
Head yellow, with brown eyes, and black antennae, thorax 
brown, covered with yellow fawn coloured down ; abdomen 
blackish or dusky above, with three spots of yellow on each 
side, and one at the tail. Inhabits Europe on dowers. 
TRIBE IV.-ATHERICERA. 
Sucker composed of four pieces ; the two contiguous ones 
furnished with palpi, retracted within the sucker into a furrow 
of the proboscis. 
Gems CONOPS.— Linnaeus. 
Generic Character. — With straight, clavate, three-jointed an- 
tenme, the second joint very long, cylindrical, the last one short, 
2 y 3 
