BRITISH HTMENOPTERA ANTHOPHILA. 429 



joint is exeeedingly long and sheath-like, its inner margin widelj 

 membranous, and its midrib set with bairs ; these bairs mucb 

 resemble those of tbe maxillae, wbicb show through the mem- 

 branous inner margin of those organs in so many genera ; the 

 2nd joint is about a third as long as the 1st, also sheatli-like ; the 

 3rd and 4th are very short, subequal, cylindrical, and divergent. 

 Beyond the divergent sides of the mentum above are seen two 

 sclerites which terminate at the base of the paraglossse ; these 

 latter organs are most strongly developed ; their bases are 

 truncate, their inner edges overlap, thus forming a complete 

 dorsal sheath for the base of the tongue ; the apices of these 

 dorsal sheaths are rounded exteriorly ; from about their middle 

 originate the lateral or blade-like portions of the paraglossse, 

 which extend as latero-ventral sheaths to about as far again as 

 the dorsal ones — i. e., to about two thirds of the length of the 1st 

 joint of the labial palpi. The lingua is exceedingly long, longer 

 than in any other genus of our British Anthophila; the base of 

 the lingua beneath is also sheathed by two sclerites, which appear 

 to be ventral portions of the paraglossse. Mentum subparallel- 

 sided, at the apex emarginate, but with its centre produced into 

 a pale angular process ; submentum exceedingly long and narrow ; 

 arms of the lora short but wide at their union ; cardines short 

 and narrow. 



Saeopoda, Latr. Gen. Crust, et Ins. iv. p. 177. 

 (PL IX. figs. 4-6.) 



Only distinguishable generically from AnthopJiora by the 4- 

 jointed maxillary palpi and the 2-jointed labial palpi, both of 

 which are sheath-like. How F. Smith and Dours managed to 

 find a 3rd and 4th joint I fail to understand. 



Ceratttsta, Latr. Hist. Nat. Ins. siv. p. 50. 



Of this genus I have only dried sp)ecimens. Labrum sub- 

 quadrate ; epipharyns long and pointed ; scales at the base of 

 the maxillse largely developed, bearing a few long hairs. Maxil- 

 lary palpi 6-jointed; blades of the maxillse with their inner 

 margin widely membranous, through which can be seen the long 

 hairs that fringe the thicker part of the blade on its underside. 

 Paraglossse sheath-like, their apices situated at about two-fifths 

 of the length of the 1st joint of the labial palpi from its base. 



LINN. .JOUEN. — ZOOLOGY, TOL. XXIII. 30 



