744 



ENTOMOLOGY. 



Andrena. Rossi. 



Apis. Christus. 



Trachusa. Jurine. 



Melitta. Kirby. Maxillae indexed at their middle, 

 or below, their terminal process triangular-lanceolate, 

 arid longer than their palpi. Hinder feet, with the first 

 joint of their tarsi as long, or longer than the tibiae. 



S/i. 1. Hirti/ies. 



Dasyfwda Mrtijics. Fabricius, Panzer, Latreillc. 



Inhabits Europe. 



S/i. 2. Plutnifies. 



Dasyfioda filumi/ies. Panzer. 



Melitta Sivammirdajnella. Kirby. 



Inhabits Europe. It was first noticed by the illustrious 

 Swammerdam. They burrow in sandy soil, throwing up 

 a heap of sand without their hole. 



* Subdivision 2. 



Superior wings with three submarginal cells, the se- 

 cond small. 



Genus DCXLIII. Andrena. Fabricius, Panzer, Ju- 

 rine, Illiger, Spinola, Klug. 



Apis. Linnaeus, Villers. 



Melitta. **c. Kirby. 



Maxillae bent at their extremity, their terminal lobe 

 scarcely longer than broad. Hinder feet, with the first 

 joint of their tarsi shorter than the tibiae. Labium or lip 

 little elongate, shorter than its palpi. 



The species of this genus are extremely numerous, 

 and a very large portion of them inhabit Britain. Their 

 proboscis is downy and thick. The hinder legs of the 

 male are furnished with a flocculus at their base, the ti- 

 biae with a thick scopa or brush, and their anus is covered 

 by a fringe of hairs. They nidificate under ground in a 

 light soil, some choosing banks over which bushes are 

 scattered, others bare perpendicular sections, but all 

 seem to prefer a southern aspect. They excavate burrows 

 of a cylindric form, from five inches to nearly a foot or 

 more in depth, of such a diameter only as to admit the 

 insect. In making these holes, they remove the earth 

 grain by grain, which they throw up on the outside of 

 their holes in the form of a hillock. Some species pene- 

 trate in a horizontal, and others in a perpendicular direc- 

 tion. They construct a cell at the bottom of this hole, 

 which they replenish with pollen made into a paste with 

 honey, and in this they deposit their eggs. The pollen 

 they carry in the scopa or brush of their hinder tibiae, 

 \ipon the flocculus at the base of the hinder thighs, and on 

 the bail's of the metathorax. When the female has com- 

 mitted her egg to the paste, she very carefully stops the 

 mouth of her hole, to prevent the ingress of ants, or of 

 other insects who might be enemies to the larva. 



Genus DCXLIV. Cilissa. Leach's MSS. 



Melitta. Kirby. 



Andrena. Latreille, Panzer. 



Maxillae bent near their middle, the terminal process 

 very much longer than broad. Lip elongate, longer than 

 its palpi. Superior wings with three submarginal cells, 

 the second small. 



This genus is not only distinguished from Andrena by 

 the characters of the lip and maxillae, but also by having 

 a longer tongue with very minute auricles, and the tops 

 of the valves cultriform. 



Sfi. 1. Tricincta. 



Melitta tricincta. Kirby. 



Andrena tricincta. Latreille. . 



Cilissa tricincta. Leach's MSS. 



Inhabits England. 



S/i. 2. Hemorrhoidalis. 

 Andrena hxmorrhoidalis. Panzer. 

 Melitta chrijsura. Kirby. 

 Inhabits Germany and England. 



Division II. 

 Lip with the intermediate division incurved, or nearly- 

 straight. Superior wings in all with three complete sub- 

 marginal cells. 



Subdivision 1. 



Lip with the intermediate division nearly straight, not 

 twice the length of the head. 



Genus DCXLV. Sphecodes. Latreille. 



Sphex. Linnaeus, Villers, Rossi. • 



Apis. Geoffroy. 



Proapis. De Geer. 



Nomada. Fabricius. 



Andrena. Olivier, Panzer, Jurine, Spinola. 



Dichroa. Illiger, Klug. 



Melitta. **a. Kirby. 



Labium trigonate, of the male entire, of the female 

 generally emarginate. Antennae of the males long, al- 

 most moniliform, arcuated. Abdomen with the greater 

 portion smooth. 



The species of Sfi/ t ecodes at first sight, bear a near re- 

 semblance to Sfihex. They make their nests in bare sec- 

 tions of banks exposed to the sun, and nearly vertical. 

 According to Reaumur, they excavate to the depth of 

 nine or ten inches, and deposit their eggs in a mass of 

 pollen mixed with honey. 



S/i. 1. Gibbus. 



S/ihecodes gibbui. Latreille. 



JVbmada gibba. Fabricius. 



Melitta gibba. Kirby. 



Dichroa analis. Illiger. 



Inhabits Europe. 



Subdivision 2. 



Lip with the intermediate division incurved, longer 

 than the lateral ones, and twice as long or more than the 

 head. 



Genus DCXLVI. Hyl,eus. Fabr. Illig. Spin. Klug. 



Apis. Linnaeus, Villers, Rossi. 



Andrena. Olivier, Panzer, Jurine, Spinola. 



Hyljeus. Fabricius, Illiger, Klug. 



Melitta. **b. Kirby. 



Haliotus. Latreille. 



Lip lanceolate, little sericeous. Hinder feet in both 

 sexes alike. Anus of the females with a longitudinal 

 groove above. 



The males of this genus are remarkable for an elon- 

 gate cylindric body. The wings of many of the species 

 are beautifully iridescent. They nidificate in bare banks. 



S/i. 1. Scxcincttis. 



Hylaus sexcinctus. Fabricius. 



Halictus sexcinctus. Latreille. 



Inhabits Europe. 



Genus DCXLVII. Nomia. Latreille. 



Megilla. Fabricius. 



Lasius. Jurine, Panzer. 



Lip very hairy, or tomentose. Hinder feet of the male 

 with dilated incrassated tibiae and thighs. 



Sfi. 1. Diversifies. 



Nomia diversifies. Latreille. 



Megilla curvifics? Fabricius. 



S/i. 2, Difformis. 



Lasius difformis. Jurine, Panzer. 



Inhabits Germany. 



