CLASS V. TNSECTA. 283 



Si'iRPS I. -^Hinder farsi with the first joint nearly equally broad, or 

 gradually narrowing from the base to tire apex, the second joint ori- 

 gioatlng from the middle of its apex. 



A . Pa/pi alike. 



Genus 472. PANURGUS. Panz., Splnola, Latr., Leach. Arts. 

 Scopo/i. Dasvpoda. Iltig., Fabr. Apis. * a. Kirhij. Eriops. 

 Klui^. 

 Mandibles not dentated : anteniue straight in both sexes, and subda- 

 vate : superior wingn with two subnrarginal cells : ocelli disposed in a 

 triangle. 

 Sp. 1. Pan. BuitksiauHS. 

 Apis Bani<siana. Kirln/. 

 Inhabits . 



B. Palpi unequal ; the labial palpi sefif'orm. 



a. Labruui nearli/ quadrate, tninsirrse, or not much longer than 

 broad. Mandibles trhlentute at their points. (^Superior icings with 

 three submnrginal cells.) 



Genus 473. CERATIXA. Latr., Jurihe, Spinola, Leach. Apis. 



Villers, Rossi, Kirbi/ (**d. '2 a). Megilla. Fabr., lllig. 



Paosopis. Fabr. Pitiiitis. King. Clavicera. W ulckenaer, 



Labrum almost quadrate, perpendicular, entire: antennec gradually 



thickening towards their extremities; the scapus not large. 

 Sp. 1. Ct)-. cdcrulea. 



Apis caprulea. ]'Ul. Apis cyanea. Kirbi/. 

 Inhabits the flowers of the Ragwort. 



b. Labrum longer than broad, inclined peipendicularlij ; porrect be- 

 neath the nmndibles; elongate, quadrate. Mandibles strong, por- 

 rected, with the apex bidentate in some ; li'igonate and often multidtn- 

 t(dc in others. 



* Labial palpi with the three first joints contiguous ; the fourth in- 

 serted under the external apex of the third. 



Genus 474. CIIELOSTOMA. Latr., Leach. Apis. LJnni, VilL, 

 Kirbi/ ( ** c. "2 y). I1\l;eus. Fabr. Anthrophoka. lllig., 

 Fabr. Antiiidium. Panz. Tkaciiusa. Jurine. 

 UFandibles {of the females) arcuated; their apex liidentate or furcate, 

 porrect, internally hairy: maxillari/ palpi three-jointed. 



The bodies of the insects composing this genus are very long, 

 slender, and cyliudric. The belly of the male, nt*ar the anus, is con- 

 cave, and covered with down, and at its base is a horn or protube- 

 rance. When asleep they roll themselves up like an armadillo, the 

 horn or protuberance litting into the anal cavity. They niditicatc in 

 posts and rails. The males usually repose in the centre of a flower. 



