19U9.] 79 



The foUowinj^ table will distinguish it from the two known 

 species. 



A. Size larger (length 1| line) ; head and thorax alutaceous, dull ... 



J/, opacicollls, Kates. 



B. Size smaller (length 1 line) ; head and thorax shining. 



(1) Basal fascia of eljtra narrow, basal tubercle furnished with a long tuft of 

 black erect setae M. penicillatn, Bates. 



(1') Basal fascia broad (occuping neai'ly the anterior half of the elytra), no 

 long tuft of setae on basal tubercle 3I.fauveli, ii. sp. 



A single specimen was taken by sweeping at Carrefour, near 

 Port au Prince, Haiti, in May, 1908. 



Type in my collection. 



The three genera, Gyrtinus, Decarthria, and Mifrmolamia, appear 

 to be very closely allied. Decarthria may be at once separated from 

 the other two by its 10-jointed antennae. Myrmolamia is distinguished 

 from Cyrtmus by its more prominent humeral angles, and its less 

 prominent basal tubercles, characters that seem to be of scarcely 

 sufficient importance for generic distinction. 



R. N. Barracks, Portsmouth : 

 March 10th, 1909. 



NOTES ON THE BRITISH DRAGONFLIES of the " DALE COLLECTION," 



(II). 



BY W. J. LTJCAS, B.A., P.E.S. 

 ( Concluded from Series 2, Vol. xix, 1908, p. 203J. 



There remain to be reviewed the Zyyopterides, that is, those 

 dragonflies in which the fore- and hind-wings are more or less alike. 

 They are contained in three and a half drawers, and comprise no less 

 than 193 insects. These, with the Anisopterides already treated, 

 bring up the total in the " Dale Collection " to 361. 



Calopteryx virgo. — There are nine specimens, a male (171), a male (173) with 

 uncoloured wings and greenish body, and one female (175) being without labels. 

 A male (169), has a blank green label, and Walcott. 1843 (J. C). A male (170) is 

 from Cosmore Comn., 1843 (J. C). A male (176), with uncoloured wings and 

 greenish body, is labelled fl. P., 1843 (J. C), while another (177) of similar 

 appearance has " anceps Ste. v. Vesta" (at side). A female (172) has two 

 labels — New Fo., 1842 (J. C), and Jun. 1842 (J. C. filled in),' while another 

 (174) has Grlanvilles Wootton (at side), 



Calopteryx splendens. — Again there are nine specimens, a male (181) and 

 a female (183) being unlabelled. A male (178) and a female (180), each bear a 

 blank green label, and Walcott, 1844 (J. C). A male (179) has a blank green label, 

 and Belfast T R :, 42 (J. C. red ink), another (182) has a small blank pink label, 



