150 AMERICAN HYMENOPTERA. 



The European P. cephalotes Latr., which I have from Marseilles 

 (E. Andre), has the comparatively small stigma and the above- 

 mentioned angle less than a right angle, but it differs from our spe- 

 cies in having the marginal cell truncate and appendiculate. 



P. halictalus Cressou, which I took on Helianthus at Santa Fe on 

 Aug. 22, 1894 (the specimen determined by Mr. Fox), and at Las 

 Cruces on Helianthus minuus on Sept. 21, 1895, has the small stigma, 

 but the inner angle of the second recurrent nervure with the cubital 

 is exactly a right angle. The tongue of halictulics is long and 

 slender, like that of a Calliopsis. 



It is perfectly evident that the so-called species of Panurgus of 

 North America are not all of the same genua. By the character of 

 the mouth-parts halictulm is an Apid, while the other species re- 

 ferred to above seem all to be Andrenids Cresson classes Panurgus 

 with the Apidse ; it is, however, in its typical form unquestionably 

 Andrenid, as is recognized by Mr. E. Saunders in his recently pub- 

 lished " Hymenoptera Aculeata of the Briti.sh Islands." It would 

 seem, however, that there has long existed some confusion in regard 

 to the proper components of this genus, for Smith (B. M. Cat. 1853, 

 pi. V, fig. 7) figures for Pamirgiis a long, slender, Apid tongue, as 

 in P. halictalus; whereas E. Saunders (Jour. Linn. Soc. Zool. xxiii, 

 1890, pi. V, figs. 4-6) figures an utterly diflTerent structure, which 

 belongs to those species which must be regarded as Andrenidse, not- 

 withstanding the moderately lengthened tongue. It is unfortunate 

 that neither of these authors tells us what species his figure was 

 taken from. 



Robertson has suggested that P. an.drenoides may be a Scrapter, 

 but Dalla Torre places Scrapter as a synonym of Macropis, and cer- 

 tainly andrenoides is not a Macropis. Smith's figure of the tongue 

 0^ Scrapter certainly suggests Panurgus (Andrenid), and differs con- 

 siderably from his figure of the same structure in Macropis. 



It is to be remarked, before leaving the subject, that the long, 

 slender tongue of P. halictulus may be less indicative of natural 

 affinity than one would be ready at first to suppose. It is, at any 

 rate, specially adapted for obtaining nectar out of the disc-florets of 

 the sunflower, and may be a comparatively recent development to 

 that end. Even the little meloid beetles ( (hiathium tcvanum Horn 

 det. Wickham) which live on the discs of sunflowers, in Mesilla, > 

 have enormously elongated mouth-parts. 



