May— July 1889.] 



PSYCHE. 



223 



peculiar long depressed tubules ending 

 in a circular membrane, out of which a 

 very short hair projects. These appear 

 to be gustatory. There are also two 

 curved rows of minute cells with a 

 nucleus, three deep, which extend on 

 each side from under the front edge of 

 the clypeus and end near the front edge 

 of the labrum, the two rows converging 

 in front ; they are very singular in 

 shape, and towards the front the cells 

 become much elongated and arranged 

 in four or five close ranks. These are 

 probably not sensory cups, but modified 

 surface setae. 



Termopsis angusticollis Hagen. — In 

 a female from the Pacific Coast I cannot 

 detect any taste- cups and any organs 

 that appear to be gustatory. The sur- 

 face of the epipharynx is simply pilose. 



Order Odonata. 



Calofteryx sp. — In a specimen from 

 Florida the armature of the epipharynx 

 is much as in Diplax, and there are 35 

 taste-cups on each side of the median 

 line, but extending farther in front than 

 in Diplax. 



Diplax sp. — In this as the other 

 dragon flies examined, the labrum is 

 full on the front edge, but there is a fine 

 median suture extending back nearly 

 half way to the base meeting a wide 

 triangular or V-shaped gap. On the 

 anterior edge of the epipharynx is a row 

 of long stiff' tactile setae ; there is a lat- 

 ei"al group of tactile bristles pointing 

 inwards and another smaller group of 

 similar setae in the middle on each side 



of the median suture, while a few 

 minute hairs extend to the suture. 



There is a group of about 14 taste- 

 cups at the base of the labrum on each 

 side of the median line ; the central 

 bristle cannot be seen, but as the nucleus 

 is well defined when looked at vertically 

 there is probably one present in each 

 taste-cup. On the outside of each gus- 

 tatory field are a few inwai'dly-directed 

 defensive setae. Also outside of each 

 group of taste-cups are near the base of 

 the labioim a group of singular parallel 

 sabre-shaped setae, pointing inwardly 

 and likewise directed towards the base 

 of the labrum. 



Aeschna heros Fabr. — Epipharnyx 

 armed with small, short, slender bristles, 

 which along the base (/.e., under the 

 base of the labrum) on each side of the 

 median line become very stout and 

 short. In front of this group of short 

 setae is a pair of short-handled brushes 

 consisting of stift', coarse setae, one on 

 each side of the median line. In the 

 middle, but situated rather far apart, are 

 two roundish pilose areas. There are 

 two groups of about 25 to 30 taste-cups, 

 like those of Calopteryx and Diplax., 

 being without a distinct hair and sit- 

 uated as in those genera. 



Order Neuroptera. 



Stalls infumata Newm. — Along the 

 median line of the epipharynx and near 

 the front are about twenty scattered 

 gustatory pegs, which are minute, but 

 longer and more acute than usual. The 

 other setae are large, long and scattered 

 over both sides of the organ. 



