LiNN^us calls this division of" his genus Gryllus, Bulla (the 

 name of a group of shells), at the same time referring to Geof- 

 froy's work, where it had received the name of Acrydium. 



This variable genus is distinguished from the other Locus- 

 t'ldiv by its very long scutellum and small elytra or superior 

 wings, which, when at rest, lie close to the sides of the abdo- 

 men. They live in fields, on hot and sandy banks, and among 

 short grass and plants on the tops of walls even in cities. 



1. A.suhu\atumLmTi.— Curt. B.E. pi. 4!39. ^ .—Sow. Brit. Mis. 



74. 1. — Don 15. 521. — bipunctatum Pz. 5. 18. — Sam. 

 p/.4./l8.— .SVi^j9Z.154.9.&10.?andl61./2.&3. 



Pale reddish brown, granulated : antenna? ochreous, tipped 

 with piceous, head and sides of thorax brown ; scutellum twice 

 as long as the abdomen, slightly recurved at the apex, with a 

 reddish or brown triangular spot on each side towards the 

 base ; abdomen pitchy ; wings iridescent, costa yellowish 

 brown, nervures pitchy; legs mottled, hinder thighs with a 

 pale stripe outside, and sometimes an oblique white fascia; 

 1st and 2nd pair of tibiae annulated with ochre. 



Philippi characterizes 12 varieties of this, and 13 of the fol- 

 lowing species. I have 1 male and 5 females with the scu- 

 tellum projecting only a little beyond the abdomen, which ap- 

 pear to me to belong to the above-described insect. Mr. Dale 

 has taken very strong varieties at Whittlesea Mere ; also at 

 Glanville's Wootton, from March 15th to July 9th. 



2. A. bipunctatum Li7m. — subulatum Rcemcr, tab. S.f. 7. var. 



— bifasciatum Fucs. Arch. pi. 52. f. 3. 



Scutellum not longer than the abdomen, and slightly curved 

 downward. 



Philippi says the antennae are only 12-jointed, but my spe- 

 cimens have the same number of joints as the former species. 

 From March 27th to October 13th, Hants and Dorset, Mr. 

 Dale; Battersea, Mr. Samouelle. 



3. A. nigricans Sow. 74. 3. — undulatum Sow.^^. 2. ? — opacum 



Fucs. fl. 52. f. 2.? — nutans Ilagenl\ 

 From 2\ to 3| lines long. Black or brown, frequently varie- 

 gated ; wings small, back arched and sometimes very sharply 

 keeled ; scutellum projecting a little beyond the abdomen, the 

 keel occasionally spotted with ochre, and a black triangular 

 spot on each side towards the base, sometimes with an ochreous 

 stripe down the back from the forehead to the tip of the scu- 

 tellum. Some varieties have pale ochre spots on the sides of 

 the thorax, and 2 fasciae outside the posterior thighs, and the 

 legs are annulated with pale brown or dirty ochre. 



End of August, heaths and sandy places, Kamsdown, Hants, 

 J. C. ; from April 8th to October 1st, Dorset, Mr. Dale. 



4. A. Pinnula Curt. Guide 451. 4. 



I suspect it is only a variety of A. bipunctatum, for like that 

 species the under wings are very small. 



The Plant is Bidens tripartita (Trifid Double- tootli). 



