284 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXIII. 



penis, the anterior not reaching the apex of the posterior, its apical 

 third a long slender hook; posterior hamule elongated triangular in 

 general shape, the sides somewhat rounded. 



Described from a single male, collection U.S.N.M., collected at 

 Trong, Lower Siam, Jan.-Feb., 1899, by Dr. W. L. Abbott, for whom 

 this fine species is named. 



Tyj)e.^Ca,t. No. 10449, U.S.N.M. 



Contrasted with other species of the genus certain differences may 

 be noted. From t-ni(jru7n it differs hi having the triangle of the front 

 wing followed by 3, not 4, cells; the face largely black; anterior fem- 

 ora without pale stripe; abdominal segment 8 black, with a lateral 

 basal pale spot, not yellow with apical one-third black; 7 with scarcely 

 basal half yellow, not basal three-fourths; 9 almost entirely black, and 



I 



Fig. 10.— GOMPHIDIA ABBOTTI FROM SlAM. A, DORSAL, AND B, LATERAL VIEWS OF MALE ABDOM- 

 INAL APPENDAGES. 9 AND lo, ABDOMINAL SEGMENTS. 



appendages differently shaped. From maclachlani it differs by having 

 the upper lip spotted with yellow and the rhinarium yellow; the abdo- 

 men with less black, and the appendages differently shaped. From 

 Jcirschii it differs in having a darker nasus; the antehumeral spots or 

 stripes absent; abdominal spots not lateral but dorsal, reduced on 

 8 instead of more prolonged; appendages differently shaped, and a 

 smaller number of postnodals. From. j^eraJcensis it differs by the more 

 extensive yellow on abdominal segments 3-6 and the smaller number 

 of postnoclals. From confluens it differs by having the subtriangle oi 

 front wing 2-celled, not 3-celled; by the differently colored face; by 

 the isolated dorsal thoracic stripes; by the black legs, and by the much 

 darker abdominal segments 7-10. From l^rugeri it differs by the 

 2-celled, not 3-celled, subtriangle of the front wing, by the dorsal 



