268 HYMENOPTERA ACULEATA. 



A. Afzeliella, Kirby (var. fuscata, Kirby; yar. stylop. 

 convexiuscula, Kirby; race? = intermedia, Thorns.). — 

 So like the preceding that its distinguishing charactei'S 

 only need be pointed out. 



<y with the antenna3 shorter, the face clothed with long 

 brown hairs, or if with short pale ones as in the race inter- 

 media, then with the third and fourth joints of the antennas 

 subequal in length, cheeks beneath, and underside of 

 thorax with fulvous, not white hairs ; abdomen punctured 

 as in Wilkella, but in race intermedia, rather more 

 shining. 



? wings with no yellowish tinge, as in Wilkella, disc 

 of the basal abdominal segment indistinctly punctured, or 

 impunctate, whereas in Wilkella it is distinctly so, apical 

 fringe dusky, or, if pale, as in race intermedia, then with 

 the abdomen rather more shining ; tibiaa as in Wilkella, 

 but occasionally entirely dark (var. fuscata, Kirb.). 



L. 8-10 mm. 



An early spring bee, appearing in April, and sometimes 

 again in August, common and generally distributed ; its 

 relationship to Wilkella is very close ; but the differences 

 given above, which were originally pointed out by Mr. R. 

 C. L. Perkins, Ent. Mo. Mag. xxv. p. 128, though slight, 

 appear to be constant. Convexiuscula, Kirb., is a stylo- 

 pized form, commonly met with ; but it probably includes 

 stylopized examples, both of this and the preceding species ; 

 and in such closely allied forms the effects of stylopization 

 render it unsafe to speak with certainty as to the specific 

 identity of an affected specimen. 



MACROPIS, Panz. 



There is only one British species of this genus, which is 

 quite unlike any other of our Hymenoptera. The genus 

 may be thus characterized. 



Labial palpi four-jointed, its points cylindrical, maxillary 

 palpi six-jointed, tongue short ovate, apiculate, labrum 



