Insects. 589 



shall be able to point out ranges of variety which will include two or 

 more separated as distinct species. Independent of the difficulties 

 arising from variety in colouring, the difference in size is also very 

 perplexing, and nothing but an extensive series of captures can fur- 

 nish the links of the chain. I shall arrange the species as I find them 

 in Kirby's Monograph, placing the new ones at the end. 



Genus. — Nomada, Fab. 

 Sp. 1. Nomada Goodeniana. 

 Apis Goodeniana, Kirby's Mon. 



Female, (length 4 J to 5 lines). Black ; head, with the antennae red, 

 and generally a black stain on the scape behind ; the mandibles and 

 margins of the labrum and clypeus are also red, the former dark at 

 their tips, a yellow line running from the base of the mandibles along 

 the inner orbit of the eyes, as high as the base of the antennae : the 

 thorax is black, the collar laterally, sometimes entirely ; the tubercles, 

 tegulae, two spots on the scutellum, a narrow line beneath, and two 

 round spots below, on the metathorax, yellow : all the coxae are 

 black; the anterior and intermediate tibiae are black at their base be- 

 neath, and the posterior beneath and behind : the abdomen is black, 

 with a yellow band on each segment, that on the first generally inter- 

 rupted, and the second more or less attenuated in the middle ; be- 

 neath, the second, third and fourth segments have an attenuated band, 

 and the fifth a waved one. 



Male, (3J to 4 lines). In general appearance very similar to the 

 female : the scape of the antennae is black behind, yellow in front, 

 five or six of the basal joints have also a dark stain behind ; the la- 

 brum and mandibles are yellow, darkish at their tips ; the clypeus 

 and inner orbits of the eyes yellow as high as the base of the anten- 

 nae : the thorax black, the tubercles, a patch beneath, the collar late- 

 rally, the tegulae, and two spots on the scutellum, yellow : the anterior 

 and intermediate coxae more or less yellow in front : the legs and ab- 

 domen as in the female. 



This species is not subject to very great variety in colouring or size. 

 I shall point out, in those instances in which species somewhat re- 

 semble each other, one or two characters whereby to separate them. 

 The males of Goodeniana may be known from those of Marsh amella 

 by the anterior and intermediate coxae being more or less yellow in 

 front, and by the yellow patch below the tubercles ; the females may 

 be separated by the yellow line on the face close to the eyes. 



This species is very abundant, and appears in April and Mav. 



