124 ENTOMOLOGICAL NEWS. [Mch., 'l2 



Gyronycha is more distant from the eye than in the majority 

 of the other genera; it is almost entirely on the lower surface 

 of the head, but should not be confounded with the gular 

 sutures, which are near the lower median line. 



The mesocoxal cavities are entirely surrounded by a bead 

 (entirely closed). 



The secondary male characters on the abdomen consist 

 in a backwardly directed carina in the apical half of the 

 third tergite, and in a small carinula at the base of the sev- 

 enth tergite. 



The type species is : 



Gyronycha valens Csy., Ann. N. Y. Ac. Sc. VII. 1893, 373. 

 With this I propose to unite G. texana Csy., ibid. 374, obs- 

 cura Csy., ibid. 375, fusciceps Csy., ibid. 376, Icpida Csy., 

 Mem. Col. II. 1911, 217, and longicornis Csy., ibid. 217. 

 This synonymy is based mainly on the entirely uniform male 

 characters, which, it is safe to assume, the above mentioned 

 forms possess. Those students who wish to record local, 

 individual or other varieties, can use the above synonyms 

 as trinomials; to me the various described (and some other 

 undescribed) forms do not present themselves as specifically 

 different. 



The species lives along sandy creeks, and probably bur- 

 rows in the soft sand. I have specimens from Arizona, 

 taken by myself in the debris of a storm-drain at Flagstaff; 

 others from Porvenir, New Mexico, were taken in evening 

 flight along the creek, and under stones at the shore of 

 another creek. One of my California specimens was taken 

 after a flood in the debris of the Arroyo Seco near Pasa- 

 dena; and finally there are in my cabinet single specimens 

 from Indiana, Maryland and New Hampshire, none of 

 them provided with data on their habitat. 



It is not impossible that Bamona robusta Slip., Biol. Centr. 

 Amer. Col. I. 2. 1883, 290, is really the type of the genus ; 

 in this case the above specific names will all lapse into 

 synonymy. 



The other species hitherto carried on our lists as Gyrony- 



