82 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXV. 



n, 



mm 



HETEROMESUS GRANULATUS, new species. 



Body of female about three and a half times longer than wide; 



surface closely covered with low granules. The 

 head and all the segments of the thorax, with the 

 exception of the anterior and middle portion of 

 the fifth segment, closely covered with irregular 

 wavy markings or impressions. The first seg- 

 ment of the abdomen is also similarly marked; 

 the first three articles of the peduncle of the 

 second antennae are spinulose. 



The frontal margin of the head is straight. 

 The eyes are absent. The first pair of antennae 

 are composed of two articles, the basal article 

 large and inflated, the second narrow and elon- 

 gate; there is a rudimentary flagellum consist- 

 ing of a single article, minute and almost im- 

 perceptible. The second pair 

 of antenna? have the first two 

 articles of the peduncle short ; 

 the third article is narrow and 

 elongate; the fourth is short; 

 the fifth and sixth are narrow 

 and elongate, the sixth being 

 about one and a half times 

 longer than the fifth, and the fifth about twice as 

 long as the fourth, the sixth a article is about equal 

 in length to the third, but is about half as wide; 

 the flagellum is composed of fourteen articles, the first three being 

 elongate. In the male the flagellum is composed of sixteen articles, 

 and only the first article is elongate. 



The head is immersed in the first thoracic segment, which sur- 

 rounds the posterior half;' the lateral margins of the first seg- 

 ment are drawn out on either side in one prom- 

 inent spine. The first three segments are about 

 equal in width and length; the fourth seg- 

 ment is longer, becoming narrower toward the 

 posterior extremity and constricted; the fifth 

 segment is narrow, elongate, about three times 

 the length of the preceding segment. In the male 

 this segment is narrower than in the female. 

 The sixth and seventh segments are short and 

 subequal in length. The seventh is a little nar- 

 rower than the sixth. 



Fig. 14. — Heteromesus 

 granulatus. female. 



Fig. 15. — Heterome- 

 s u s granulatus. 

 Second antenna 

 of female. 



Fig. 16. — Hetero- 

 mesus granula- 

 TUS. First leg 

 of female. 



a The peduncle of the second antennae is six-jointed and not five-jointed as 

 other authors have described it for other species, 



