July, 1913.] 145 



— Small and dark as compared with pini. Length only about 7 mm. 



Abdomen more cylindi-ical and not wider than the thorax. The ground 

 colour is a paler yellow than in pini, but very little of it is visible above 

 except on the pronotum and at the apex of the abdomen, the rest of the 



dorsal surface being almost immaculate black .fndetorum, F., ? . 



(= variegatus, C, nee. Hartig) 



6. Ventral svirface of abdomen immaculate black pini $ . 



more or less ruf escent 7. 



7. Femora, tibiae, and tarsi almost uniformly white throughout. Hind wings 



not clouded towards apices. Antenna with only 18 pectinated joints 



pallidus S • 



— Eufescence of abdomen beneath pale (inclining to yellow or orange rather 



than to true red !). Femora within and apices of tibiae and tarsi more or 

 less distinctly infuscated. Hind wings with a brownish clouding 

 -" towards their apices. Antennae normally (always ? ?) with more than 

 18 pectinated joints 8. 



8. Pronotum and mouth parts yellow. Sides and ventral siu-face of abdomen 



very bright red (almost scarlet !). 20 pectinated antennal joints... 



virens $ . 



— Mouth dusky ; pi-onotum either entirely black or Avith a very narrow pale 



edge. Eed on abdomen darker (according to Hartig. !) Only 19 pectinated 

 antennal joints frutetorum J . 



9. ? with head and great part of the body above riif escent : J with unusually 



long antennae which may have as many as 23 pectinated joints ! Scutelhim 

 impimctate sertifer, Geoffr. 



— ? with head and body black (not rufescent) above, ^ with 18 pectinated joints 



(according to Thomson), and scutelkun with large scattered punctures. 

 Thomson adds that this species differs from all the others in having the 

 " unguiculi " rmtoothed pallipes, Fall. 



NOTES ON CERTAIN OF THE SPECIES. 

 Pallidus is called by Cameron " dorsatus,¥." ; while Konow refers dorsatus, 

 F., to pallipes, and proposes to sink the latter name accordingly. But Fabri- 

 cius's original type-specimen of Hylotoma {sic) dorsata is now at South 

 Kensington in the Banks Collection, and is certainly neither pallidus (having 

 simple hind calcaria), nor pallipes (having the humeral area in the hind wing 

 shortly appendiculated). I have examined the specimen carefully, and am 

 certain it is nothing but pini. 



Almost all authorities, following Klug, call sertifer by the name of rufus. 

 It is no doubt the Tenthredo pectinata rufa, of Retz. ; but that name cannot 

 stand. It is not " binominal," and besides, Retzius had already described 

 another Tenthredo rufa, which is a synonym of amerinse, L. The ? described 

 by Geoffrey in Pourcroy's Ent. Paris, as T. sertifera is undoubtedly the insect 

 described by Klug, &c., as rufus ; and Geoffroy's name being earlier, Cameron 

 was right in adopting it. (But the form " sertifer " is preferable, I think, 



philologically, to " sertiferws," as Camei'on writes it.) 



N 



