MUSEUM OF COMPARATIVE ZOOLOGY. 21 



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

 teriorly, unitetl oy a deep transverse sulcus, which in the metasternuni is nearly as 

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

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

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

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

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

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

 Fore tibial foramina visible from above as similar longitudinal slits with 

 rounded borders, the tibiaj but slightly enlarged by tlieir presence ; fore femora 

 slightly shorter than 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 tibiae with no apical spine above on the outer side. 



Nesoecia cooksoni. 



Plate III. Figs. 9, 10. 



Aqracia cooksoni Bull., Proc. Zool. Soc. Loud., 1877, pp. 87-88. 

 Bwrates? cocoanus? Brun. ! (nee BoHv.), 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 ininiature; 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 Alljemarle Islands. The specimen referred hesitatingly by Bruner to 

 Bucraits 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 

 on 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 Tosa in July ; and an immature 

 specimen at A([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 0.5 mm.; tegmina, male 8 mm., female 7 nun.; hind femora, male 15.5 

 mm., female 17 mm.; ovipositor, female 13.5 mm. 



Subfamily CONOCEPHALIN.E. 

 Conocephalus insulanus, sp. nov. 



Plate III. Figs. 3, 3. 



Probably green in life, tlie s])ecimcns in hand discolored by alcohol. Fas- 

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



