1893.] Mil, E. E. AUSTEX ON NEW J31PTE110US INSECTS. 157 



the ty\je of the species : the specimeu in question is about 8 unii. 

 in length, and resembles the female in general appearance ; tlie 

 face and chccls are, ho\ve^■el', sait'ron-yellow, instead of pale yellon" ; 

 the frontal triangle has a brownish median stripe extending fj-om 

 the autenniferous projection nearly to the angle of the eyes : the 

 abdomen is narrower, and somewhat contracted and cylindrical at 

 the base ; the first segment is brownish in the centre ; the third 

 segment has a fairly broad posterior brown band, with the lateral 

 angles only faintly indicated ; tlie median brown mark projecting 

 from the anterior margin is o\al in shape, and does not extend 

 further than one-fifth the lengtli of the segment ; the wini/s are 

 somewhat browner, and less yellow, but this is also the case in the 

 smaller of the two females mentioned above; the posterior femora 

 have a narro^^" incomplete broMui>h baud beyond the middle. 

 This specimen is likewise from the region of the Amazons {Bates). 



Bacciia crocea, sp. n. (Plate Y. fig. 6, c5' •) 



d" . Length 8| to 9 mm. 



Closeli/ allied to B. crocata ; saffron- t/ellow ; tJiorad' metallic, verij 

 shitiimj, brown In the centre of the dorsum, tvith two narrow abbre- 

 viated yellow stripes ; abdomen narrow at the base, but ewjjandiju/ 

 rcgularlif to the end of the fourth seynient, with broiun bands and 

 indentations, but the third setjment with no broivn at the basal anijlai ; 

 ivini/s suff'used ivith jiale brown, alidce rudimentanj ; hys yellow, 

 posterior femora with a narrow but distinct brownish band beyond 

 the middle, darkest on the outer side. 



The chief differences between this species and crocata appear in. 

 the front, thorax, and third seyment of the abdomen ; the front is 

 shining yellow, instead of dull orange (the black dot above the 

 base of the antenn;o is present) ; the thorax is very shining, and 

 the narrow yellow stripes whicli are situated on either side of the 

 median line are due to the ground-colour, and not to pollen ; 

 the metauotum is brownish, but there is no dark stripe exteudiug 

 backwards to it from above tlie middle coxa) ; the first abdominal 

 segment is brown in the ceutre, as is the case in the specimen 

 which I have considered as a male of crocata, but the absence of 

 brown from tlie basal angles of the third segment gives that 

 segment quite a different appearance ; tliere is likewise no brown 

 in the basal angles of tlie fourth segment, but this, so far as its 

 damaged condition ])ermits me to judge, is likewise the case in the 

 specimen I consider to be a male of crocata ; in other respects the 

 brown markings of the abdomen are almost precisely similar to 

 those seen in crocata-, the median brown stripe on the fourth 

 segment stops short of the anterior margin in the typical specimeu, 

 but reaches it in the other example in the collection ; the wings 

 are less infuscated than in the supposed male of crocata, and are 

 somewhat nan-ower and longer ; the third longitudinal vein is 

 straighter, and the terminal ])ortion of the fourth vein, closing 

 the first posterior cell, less sinuate. 



Brazil, region of the Amazons (Bates) ; two specimens. 



