106 PROCEEDINGS OF THE ACADEMY OF [1896. 



The known range of P. albipen7iis is greatly extended by a 9 

 sent to me by Mr. Fox, caught in Nowlin Co., South Dakota. The 

 name of the collector does not appear on the label. The clypeus is 

 marked practically as in lingualis, but the glossa is not hairy. 

 Stigma pale orange. Second submarginal cell narrowed fully one- 

 half to marginal. 



Since the above was written, Mr. Fox has examined for me Cres- 

 son's types of hyalina ( <? ), and reports that one has the abdominal 

 marks as in verbesince and helianthi ; but the other must be held to 

 be the true type, as Cresson does not mention the marks. The form 

 above, described as pasonis, has only a very small clypeal mark, so 

 it is in all respects very similar to what we must call albipennis var. 

 hyalina (Cr.). 



Many years ago, P. albipennis was taken by Belfrage in Bosque 

 Co., Texas. (Cresson, Tr. Am. Ent. Soc, 1872, p. 261.) This is 

 a little east of the 98th meridian. 



70. Perdita lepachidis n. sp., or race. 



$. — Length about 6 J mm. Resembles the $ of albipemiis, hut 

 head and thorax brassy-green, not at all bluish-green. Vertex 

 quite densely and deeply punctured. Clypeal markings reduced to 

 a yellow median line and yellow lower corners, occasionally the 

 whole anterior margin of clypeus yellow, connecting with the longi- 

 tudinal line. Mandibles simple. Metathorax rather inclined to 

 bluish. Wings and abdomen as in ^ albipennis. 



The flagelkim is orange, the two spots on the hind margin of pro- 

 thorax are feebly developed, the front is fairly shiny, not nearly so 

 dull as in verbesince. 



Hab. — On flowers of Lepachys tagetes (James), Santa Fe, N. M., 

 July 30, 1895, and Socorro, N. M., June29th. I do not know how 

 late it flies, but the Lepachys is over sooner than the Verbesina or 

 Helianthus. The characters of this species or race are slight, but 

 constant in the specimens examined. The 9 is unfortunately un- 

 known. 



Appe7idix : Species received since the above paper was ivritten. 

 Perdita utahensis n. sp. 



9 . — Length 8 mm. Head dark blue-green, thorax brassy-green ; 

 Metathorax green, not blue, but so dark as to be almost black. 

 Head of ordinary size, about as broad as long ; face and cheeks 

 hairy, the hairs dull white, those on occiput gray. Front strongly 

 granular, with moderately close punctures ; facial ridge with a median 



