MUSEUM OF COMPAHATIVE ZOOLOGY. 21 



broadly transverse like the metasternum, both, with a pair of very deep fossae pos- 

 teriorly, united oy a deep transverse sulcus, which in the metasternum is nearly as 

 deep as the fossee and arcuate, the fossae more distant in the mesosternum (where 

 each is nearer the other than the outer margins of the lobes) than in the meta- 

 sternum; lobes of both forming tumid bosses more or less obliquely disposed. 

 Tegmina abbreviated, of about the length of the pronotum, the inner mar- 

 gins divergent in the female, parallel and attingent beyond the stridulating 

 area in the male, densely reticulate, the principal veins distinct and subparallel. 

 Fore tibial forandna visiljle from above as similar longitudinal slits with 

 rounded borders, the tibiae but slightly enlarged by their presence ; fore femora 

 sliglitly shorter tlian the middle pair, both with a pair of subapical spines 

 on their anterior carina; hind femora twice as long as fore pair, armed exter- 

 nally beneath with four spines toward the apex, the genicular lobes small and 

 rounded ; hind tibiaj with no apical spine above on the outer side. 



Nesoecia cooksoni. 



Plate III. Figs. 9, 10. 



Aqrcccia cooksoni Butl., Proc. Zoiil. Soc. Loud., 1877, pp. 87-88. 

 Buaates? cocoanus? Brun. ! (nee Boliv.), Proc. U. S. Nat. Mus., XII. 192. 



There is no doubt that the insect described liy Butler is the one before me, 

 although placed by Butler in an entirely wrong subfamily. Butler's specimens 

 were immature; at least he so regarded them and made no mention of tegmina, 

 though the largest were certainly full-sized ; he reported them from Charles 

 and Albemarle Islands. The specimen referred hesitatinglj^ by Bruner to 

 Bucrates cocoanus Boliv. (also to a wrong subfamily) was immature, and was 

 taken on Charles Island by the U. S. Fish Commission in 1888. L. Agassiz 

 oa the "Hassler" expedition took 1 male and 1 female mature on Albemarle 

 Island, the female in a bird's nest ; and G. Baur obtained mature specimens 

 (2 males, 2 females) on Albemarle Island at La To.sa in July ; and an immature 

 specimen at Ai^uada on Indefatigable Island. I append measurements of the 

 adult. 



Length of body, male 33 mm., female, 33 mm.; of pronotum, male 6 mm., 

 female 6.5 mm.; tegmina, male 8 mm., female 7 mm.; hind femora, male 15.5 

 mm., female 17 mm.; ovipo.sitor, female 13.5 mm. 



Subfamily COXOCEPHALIX^E. 

 Conoceplialus insulanus, sp- nov. 



Plate III. Figs. 2, 3. 



Probably green in life, the specimens in hand di.-^colored by alcohol. Fas- 

 tigium of vertex short, broad, aiiically rounded, with parallel sides barely ex- 



