106 [May, 



A more detailed account of this curious creatvu-e is being prepared 

 by Dr. Jordan and myself, which will eventually be published, with a 

 more detailed description and account of its anatomy and morphology, 

 and a discussion of its relations to the true earwigs. 



I may add that Dr. Jordan informs me that the mandibles are 

 provided with a tooth beyond the centre of the inner edge, differing 

 from A. esau, and the upper lip is much longer. 



It is especially noteworthy that in the abdomen of the female we 

 find ten tergites fully developed, as in the male ; this is a striking 

 difference from the true earwigs, in the females of which, as is well 

 known, the seventh and eighth segments are vestigial. 



Castle Hill Hoiise, Dover : 

 March 25th, 1912. 



THREE NEW SPECIES OF THE " ALBIMANA " GROUP OF THE 



GENUS HETEBONEURA (dipteba) 



BY J. B. COLLIN, F.E.S. 



When Czerny revised the family Heteroiieuridse in 1903,* the 

 only species possessing a strong pair of dorso-central bristles in front 

 of the thoracic suture recognised by him was albimana, Meig. ; there 

 are, however, other xmdoubtedly distinct species belonging to this 

 group, and having been fortunate enough to capture two of these 

 species during the last few years in sufficient numbers to prove that 

 the male genital characters upon which all the species are mainly 

 founded are reliable specific distinctions, I venture now to piiblish 

 the descriptions. 



Heteroneura caledonica, n. sp. J V • 



Resembling H. alhiviana, Mg., but with only two pairs of orbital bristles ; 

 vibrissBB much shorter ; male hypopygium miich larger, the lamellae long and 



recurved at the tip (Fig. 1). 



The face, palpi, and antennae are in no way 

 darkened except the last named about the 

 base of the arista, the arista somewhat shorter 

 than in albimana, hind orbital bristle twice 

 as long as the front one and about midway 

 between it and the inner vertical bristle, de- 

 cussate bristles midway between the upper 

 and lower orbital bristles. The four posterior 

 Fig. 1. //. rahihnica, s X 40. jggg almost entirely pale, more extensively so 



* Wien. But. Zeit, xxii, pp. 01-100, pis. I-III. 



