COCKERELL— HYMENOPTERA, APOIDEA 33 



XII. I intended to name the species after the collector, but there is already a species 

 H. duponti Vachal ; I therefore use the name of the author to whom I am indebted for 

 a description of the type locality*. 



This is a very ordinary species of EvyloBus, a group common in Exu-ope, North America 

 and other parts of the world. 



The female H. nicolli, except for the antennae, has a very strong superficial resem- 

 blance to the male of H. diversus Smith from Willowmore, Cape Colony (Braims). In 

 H. diversus, however, the outer nervures are not weakened, and there are many other 

 differences. H. geigerice Ckll., from Benguela, is really much more closely related, but 

 differs from H. nicoUi by the comparatively shining mesothorax, with its disc sparsely but 

 distinctly punctured, the basal abdominal bands reduced to lateral patches, &c. 



A somewhat similar species is H. ininikoiensis Cam., from the Laccadive Islands. 

 I examined the female tjrpe of this (Cambridge University Museum) and noted that it 

 was rather of the type of the American H. cooleyi ; black ; head with pale hair ; meso- 

 thorax dullish, with punctures of two sizes ; tegulse shining dark red-brown ; flagellum 

 ferruginous beneath; stigma and nervures ferruginous; first r.n. meeting second t.c. ; 

 hind spur with few long spines ; abdominal segments with broad basal bands of pale 

 tomentum, usually concealed in middle by segment before. 



4. Halictus mahensis Cameron. 



Halictus mahensis Cameron, Trans. Linn. Soc. London, ser. 2, Zoology, vol. xii. 

 (1907), p. 70. 



The following particulars may be added to Cameron's account : 



Hind spur of female with three or four large teeth ; mesothorax appearing granular 

 under a lens, with the compound microscope seen to be minutely tessellate and with small 

 punctures. 



Mouth-parts (measurements all in /x): mandibles bidentate; maxillary blade 425 long; 

 maxillary palpi, joints (l) 90, (2) 160, (3) 150, (4) 150, (5) 160, (6) 170. Labial palpi, 

 (1) 170, (2) 85, (3) 120, (4) 135, the first joint robust. Tongue about 1020, tapering at 

 end. These measurements are from a female ; a male tongue measured about 935. The 

 labrum of the female has a large lobe ; I figure the labra of both sexes. 



Localities. Mr Scott obtained a very large series of this species from the Seychelles, 

 with the following data : 



(1) Mahe. Cascade Estate, 800—1000 ft., 7 ^, 1 ?; Cascade Estate, January 1909, 

 1 ^, 1 ?; Anonyme Island, January 9, 1909, 14 ^, 2 ?; top of Mount Sebert, nearly 2000 ft., 

 January 16, 1909, 1 ? ; Cascade Estate, February 1909, 2 ^, 4 ? ; Cascade Estate, October 

 1908— January 1909 {Thomasset and Scott), 1 ^, 1 ? ; Long Island, July 12—22, 1908, 

 1 ^, 1 ?; Cascade Estate, February 1909, 1 ?. 



(2) Dennis Island. August 1908, 3 S- These were collected by J. C. F. Fryer. 



* [For a full and accurately scientific account of tliese islands see J. C F. Fryer's article in Traits. 

 lAnn. Sol-., ser. 2, Zool., vol. xiv, pp. 397 — 442. This report was not published when the above was 

 written. — J. Stanley Gardiner.] 



SECOND SERIES— ZOOLOGY. VOL. XV. 5 



