188 PROCEEDINGS OF THE ACADEMY OF [Oct., 



I cannot associate these specimens with any description, but 

 realize that in this Httle understood genus they may have been 

 described previously. However, I hesitate to let these well-preserved 

 specimens remain in the collection without a name or with a temporary 

 determination. 



MYDAID^. 



Ecthypus limbatus Will. 



1886. Williston, Trans. Am. Ent. Soc, xiii, 292. 



Before me is a male from Waterman Canyon, Amador County, 

 California, May, (J. C. Martin), [Cal. Acad. Sci.], which is appa- 

 rently this species. The species is based on a female from Arizona. 

 The male is herewith briefly described. 



Rufous; occiput, frons, proboscis, apex of third antennal joint, 

 three mesonotal stripes, notopleural stripe, pectus, bases of first and 

 second abdominal segments, lateral margins of remaining segments, 

 bases of ventral segments, and apical appendages of hypopygium, 

 black. Apical margins of dorsal and ventral segments conspicuously 

 yellow. Wings except apices yellowish tinged. Proboscis project- 

 ing sHghtly beyond second antennal joint; third antennal joint 

 slender, five or six times as long as first two together; club consists 

 of about three-fourths of third joint, robust, of about equal width 

 throughout, except at apical fourth, w^hich tapers. Hind femora 

 thickened at apical three-fourths and spinose beneath; tibiae straight. 

 First posterior cell open. Length, 24 mm. 



Leptomydas pantherinus Gerst. 



1868. Gerstaecker, Stet. Ent. Zeit., xix, 85. 



The males here are black except the knees, tibiae, tarsi, and pos- 

 terior margins of the abdominal segments especially 'the apical ones. 



Before me are 4 cf , 4 9, from the following localities in California : 

 Colma, July to August, (J. A. Kusche), [Cal. Acad. Sci.]. San Fran- 

 cisco, March, (J. A. Kusche), [Acad. Cal. Sci.]. Mesa Grande, 

 Sonoma County, June, (J. P. Baumberger), [A. N. S. P.]. 



Leptomydas sponsor O. S.? 



1886. Osten Sacken, Biol. Cent. Amer., Dipt., i, 68. 



A male from Coronado, May, (F, E. Blaisdell), [Cal. Acad. Sci.], 

 which seems to be this species has the following characters: 



Head and thorax entirely black with white polished pilose mark- 

 ings. First abdominal segment and following ones, laterally, black; 



