384 PROClJhJUIXdH OF THE XATIOXAL MUSEUM. vol.37. 



is dull brown). There is nothing in de Selys's description and Mar- 

 tin's recent figure which conflicts with the specimen before me unless 

 it be the form of the vulvar lamina. The triangles of all four wings 

 and the subtriangles of the front wings are all crossed. 



To this species I refer a badly faded female in the Museum of Com- 

 parative Zoology labeled ''Texas," though in this specimen all tri- 

 angles and subtriangles are free. 



Material examined. — Raleigh, North Carolina, July 31 and August 

 30, 1902, August 9, 1904, June 30, 1905, and September 12, 1907, 

 4 males, 1 female, C. S. Brimley (C. S. B.) ; 1 male with last 5 ab- 

 dominal segments gone. Texas, female (M. C. Z.). Total, 4 males, 

 2 females. 



MACROMIA PACIFICA Hagen. 



Length of abdomen: Male, 48.5-53 mm.; average, 50.9; female, 

 46.5-53.5 mm.; average, 50.6, Length of front wing: Male, 43.5-50 

 mm.; average, 47.2; female, 46-53 mm.; average, 49.3, Length of 

 hind wing: Male, 41.5-48 mm,;' average, 45.3; female, 44.5-49.5 mm.; 

 average, 47.3, Length of first tibia, male, 7.5 mm.; hind femur, 

 male, 11.8 mm. Length of tibial keel in length of tibia, male: First 

 tibia, f to I — ; middle tibia, J to f . 



Antehumeral thoracic stripe well developed, separated at its upper 

 end from the antealar sinus by about its own width, Latero-ventral 

 m«tathoracic carina brown or rarely very narrowly yellow. Yellow 

 ring on abdominal segment 2 very wide, narrowly interrupted dorsally 

 by a posteriorly projected middorsal black line which in a few males 

 does not completely traverse the yellow. Costa distinctly yellow to 

 the wing tip. 



Male. — Postclypeus green-yellow, labrum dull yellow; dorsal spots 

 on frons occupying the entire surface but the median sulcus, continu- 

 ous just in front of the antennae with the lateral spots (rarely separated 

 by brown, the separation narrowest posteriorly) ; lateral spots are 

 about equal in size or smaller than the dorsal spots. 



Abdominal spots large, but on 3-6 divided dorsally by a narrow 

 black line; the spots occupy the area anterior to the transverse carina 

 on each segment but 7 and 8, where they are continued posteriorly, 

 and in length of each segment are about as follows: On 3, ^ to 4 + ; 

 on 4, h —to J; on 5, J + ; on 6, J; on 7, i to §; on 8, | to J; the dor- 

 sal separation is widest on 3 and the spots on this segment are sepa- 

 rated from the base of the segment by black about 1 mm. wide; on 

 4-6 the spots are quadrangular and are separated from the base of 

 each segment by about 0.5 mm.; on 7 and 8 the spots reach the base 

 of each segment; spots on 7 and 8 have a triangular posterior projec- 

 tion on either side of the middorsal line; spots on 3 and 7 are sepa- 

 rated from the inferior spots on each segment or are narrowly con- 

 nected just anterior to the transverse carina; spot on 8 encircles the 



