246 



BULL1;TTN 54, UNITED STATES NATIONAL MUSEUM. 



40. Genus INDUSA" Schioedte and Meinert. 



Body convex, anteriorly luirrowod, or compressed from side to side. 

 Head hut little immersed. . First pair of antemiie almost contiguous 

 at the base, slender, not dilated. 



Anterior margin of the first thoracic segment widely sinuated, the 

 antero-lateral angles but little i)roduced, rounded. 



Abdomen but little immersed. 



Fig. 255. — iNDUSA carinat.\. 

 Head and first thorac- 

 ic SEGMENT. X 5. 



Fig. 256.— Indusa carin- 



ATA. X 2f . 



INDUSA CARINATA'' Richardson. 



Imhisa car'mata Richardson, Proc. U. S. Nat. Mus., XXVII, 1904, p. 52. 



Locality. — West coast of Panama. 

 Parasite of Mvgil h(>i<2>eH. 



Body very convex, being liighly and roundly elevated. Thorax 

 large, rounded, almost as wide as long, the last two segments rapidly 



converging to the narrow 



a])domen. Abdomen nearly 



three times narrower than 



greatest width of thorax, 



with all the segments of 



equal width. 



Head al)out two and a half 



times narrower than first 

 thoraic segment and four times narrower than 

 fourth segment; front triangular in shape and pro- 

 duced into an acute point projecting between the 

 basal joints of the antennse. Eyes distinct and 

 situated at the sides and about the middle of the head. First pair of 

 antenna% which are almost contiguous, being separated only by the 

 very acute median point, reach to the ejes; llagellum seven jointed. 

 Second pair of antennte extend to the posterior margin of the head; 

 flagellura nine jointed. 



First thoracic segment rounded anteriorly and posteriorly, the sides 

 of the segment surrounding the head, the lateral angles extending to 

 the eyes. The tirst four segments gradually increase in Avidth. The 

 fourth and Hfth are about equally wide. The sixth and seventh 

 rapidly decrease in width, converging to the narrow abdomen. The 

 epimera are well developed on all the segments with the exception of 

 the first; they are narrow and elongate, rounded posteriorly and not 

 reaching the posterior margin of their respective segments. 



The abdomen is likewise very convex and is nearly three times 

 narrower than the thorax at its greatest width. The segments are of 



"Schiaxlte and Meinert, ISaturhistorisk Tidsskrift (3), XIV, pp. 334-335. 

 ?'Tliis si)ecies is included because the lish on which it is parasitic is found on the 

 coast of Mexico. 



