340 Mr. T. D. A. Cockerell — Descriptions and 



form, rather long (at least ?) min.), width of flagellum about 

 170 fi ; abdomen as in Ilulictua, sessile, about 2 mm. broad. 

 Wings hyaline, nervures and stigma pale testaceous ; length 

 of anterior wing about 4| mm. 



The following wing-measurements are in /x : — 



Depth of stigma 238 ; length of marginal cell 16L5 ; width 

 (or depth) of marginal cell 425 ; length of first submarginal 

 918; lower side of first s.m. 663; length of second s.ra. 

 (from one lower corner to the other) 629; second s.m. on 

 marginal 391 ; tiiird s.m. on marginal 663; third s.m. below 

 493; length of first discoidal 1224; upper side of second 

 discoidal 765; lower side of second discoidal 884; length of 

 third discoidal (from angle formed bj first and second to 

 lower apical corner) 1156; b n. on first s.m. 255; b. n. on 

 first discoidal (not allowing for curve) about 561. 



Hah. Fossil in the Miocene shales o£ Florissant, Cjjlorado, 

 at Station 14 {W. F. Cockerel!, 1907). 



Without any clue to the mouth-parts it is difficult to place 

 this singular genus in its correct systematic position. The 

 general appearance, and the large stigma, marginal cell, and 

 bent basal nervure are all as in the Halictines. The form of 

 the second submarginal cell, with the first r. n. joining it 

 before the middle, as well as the second r. n. with a double 

 curve, suggest affinity with the Colletines. The really 

 anomalous character is found in the third transverso-cubital 

 nervure, which has a strong double curve, and has its upper 

 section more apicad than the lower, just reversing the normal 

 condition. This is quite clearly visible in both wings, and 

 evidently not an abnormality. 



Ceratina hinghami, sp. n. 



Ceratina viridissiina, Bingham, Faun. Brit. Iniia, Hymenoptei*a, vol. i, 

 p. 501. — Not C. viridissima, Dalla Torre. 



This Indian species has long passed as Ceratina viridis, 

 Guer., as it agrees sufiiciently with Guerin's short descrip- 

 tion. Tiie name of the species was needlessly altered to 

 viridissima by Dalla Torre on account of supposed preoccupa- 

 tion. The original viridis was from Senegal, W. Africa, and 

 has not been found in that region since 1845, unless an 

 insect re|)orted by Meunier as a variety of his C. congoensis 

 really belongs to it. I have just received from Dr. F. C. 

 Weilman some specimens (2 ? , 1 cj) of a CVa^^'wa collected 

 by him in the Ekuiva Valley, ICO miles east of B^nguella, 

 and these 1 refer Avithout hesitation to C. viridis. One of 

 the females was visiting the flowers of an orchid. Compared 

 with the Indian insect these viridis are more robust and much 



