Illinois: 2 9 specimens, taken Aug. 12, on flowers of Malva rotun- 

 difolia and Siurn eicnttrjoHinn. 



It closely resembles H. confusus, but differs by its smaller size, 

 enclosed metathorax, etc. 



g. Halictus apopkensis. 9 — Head and thorax greenish, abdo- 

 men brownish ; face broad, rounded, finely and rather sparsely punc- 

 tured, clypeus hardly produced; mesothorax minutely roughened, 

 somewhat shining, minutely and very sparsely punctured, appearing 

 impunctate, with very thin whitish pubescence ; metathorax shining, 

 sculptured as in preceding ; wings whitish hyaline, nervures and stigma 

 very pale, tegulse testaceous ; knees and tarsi testaceous ; abdomen 

 shining, clothed with thin, pale pubescence, apical margins of segments 

 testaceous. Length 5 mm. 



Florida: 3 9 specimens, taken Feb. 12 and 16, on flowers of Prunus 

 umbeUai a and Viola lanceolata. Readily distinguished from the pre- 

 ceding by its paler wings and more sparse punctuation. 



io. Halictus anomalus. 9 — Head and thorax dull greenish; 

 face rounded, clypeus produced ; disc of mesothorax finely rough- 

 ened, hardly shining, bare, or nearly so, with sparse, rather coarse, 

 shallow punctures ; metathorax shining, not strongly retracted, the 

 disc with elevated lines not reaching apex ; wings hyaline, Avith only 

 two submarginal cells, nervures and tegulse testaceous; abdomen 

 brownish, shining, impunctate, with thin, pale pubescence. Length 

 4-5 mm. 



Illinois : 2 9 specimens, taken May 19, on flowers of Hypoxis ereeta. 



ii. Halictus longiceps.9 — Head as' long as thorax, strongly 

 produced behind eyes, clypeus strongly produced, eyes long ; meso- 

 thorax minutely roughened, hardly shining, finely and sparsely punc- 

 tured, clothed with thin whitish pubescence ; metathorax narrow, disc 

 finely roughened ; wings whitish, hyaline, nervures and teguke pale 

 testaceous, third submarginal cell subobsolete ; abdomen depressed, 

 shining, clothed with pale pubescence. Length 4-5 mm. 



Florida : 4 9 specimens, taken Feb. 10 to 18, on flowers of Prunus 

 umbellata. 



Andrena mandibularis. $ —Black, clothed with long, thin, p*h 

 pubescence; head broader than thorax, strongly produced behind 



eyes; face broad, subquadrate, clypeus flat, shining, thinly pubescent. 



