HYMENOPTERA. 183 



NOTES ON S(Mli; GENERA OE IS I IS. 



BY T. D. A. COCKERELL. 



A few years ago Mr. J. Vachal sent me a lot of critical comments 

 on Mr. Ashmead's "Classification of the Bees" (Trans. Am. Ent. 

 Si >c, xxvi). At the time, I suggested that he should publish them ; 

 but I believe he has not done so, and as many of them are import- 

 ant, I present them here. I add various remarks of my own, but 

 in every instance Mr. Vachal's observations are carefully credited 

 to him. The paper is intended to be supplementary to that of Mr. 

 Ashmead, contributing facts which will have to be considered when 

 a revised classification is prepared. 



NOMIOIDES Schenck. 

 According to Mr. Vachal there is no rima or furrow on the fifth 

 dorsal segment of the female, as in other Halictinse. However, in 

 a female of A. variegatus from Triest, June 8, 1897 (Ducke, com. 

 Friese), it is distinctly present, though lacking the fringe of hairs 

 seen in Halictus. In A. pulchellus I find the maxillary palpi twice 

 the length of the galea, six jointed, the joints about equal, except 

 the first, which is shorter. The labial palpi have four joints of 

 equal length, or approximately so. The mouth-parts are essentially 

 as in Halictus. Mr. Vachal says Nomioides is not Lucasius, a genus 

 " founded on two aberrant male Halictus, of which the females are 

 true Halictus." I have Lucasius, and it is not at all like Norn wide*. 



DIOONIA Gribodo. 

 This cannot go in Sphecodinpe. Mr. Vachal writes : "Didonia, 

 after the description of Gribodo, is not destitute of pollen-collecting 

 apparatus: 'Pedibus posticis autem ut in Amdrenis, flocculo pollini- 

 gero trochanterorum magno ; ' Gribodo put it in Andrenidse, Latr. 

 = Panurgidre, Ashm." 



CAUPOLHASTA Spinola. 



Mr. Vachal states that the second and third cubital cells are not 



equal, the second is much shorter, the first recurrent nervure almost 



or wholly interstitial with the first transverse cubital nervure. As 



a matter of fact, Caupolicana is quite identical with Megacilissa. 



TRANS. AM. ENT. SOC, XXIX. MAY. 1903. 



