149 



A compact species, the head as broad as the thorax, about as broad as 

 long, eyes strongly convergent below, scape not strongly dilated, arched 

 on the side next the head. Pronotum with the collar rounded, narrowed 

 and subintrrupted medially, the angles not prominent. First recurrent 

 received by the first cubital cell near its apex, the second interstitial or 

 nearly so. 



Length 5.5 mm. ; wing 4.5 mm. 



Described from one $ collected in 1917 at Los Banos, 

 Philippine Islands (F. X. Williams). 

 Type in the author's collection. 



Hylaeus (Nesylaeus) chinensis (Perkins). 

 Nesoprosopis chinensis Perkins. 



Trans. Ent. Soc. Lond. 1911 :r25 $ . China. 



21. Japanese Hylaeus. 



Frederick Smith described two species of the genus from 

 Japan under the names of Prosopis floralis and Prosopis per- 

 forata (Tr. Ent. Soc. Lond. 1873:199) and Yachal one Pro- 

 sopis globida (Bull. Mus. Hist. Kat. Paris 9:132, 1893). 

 Hylaeus floralis (Smith) by the description closely resembles 

 the species described below as Hylaeus gnathyla.eoidcs but 

 differs in slight details of coloration of the legs and in the 

 coloration of the wing veins. I should, however, consider my 

 species the same except for the different male which I asso- 

 ciate with these females. H. floralis is described from Hiogo 

 on the southern coast while H. gnathylaeoides comes from 

 the mountains of the interior. Hylaeus perforatus is said to 

 differ from floralis in having the head longer and the clypeus 

 with only the anterior margin pale and the truncation of the 

 propodeum abrupt with the margins somewhat raised. I 

 have not been able to consult the description of Hylaeus globu- 

 lus (Vachal) and do not know if it is identical with one of 

 the following species. Prosopis Miyokei Matsumura 

 from the island of Sakhalien, from the description, (Jour. Coll. 

 Agr. Sapporo 4:108, 1911) is not a Hylaeus but probably 

 belongs to the Halictidae, perhaps to Erylaeus Robertson. 



