THE AMBUSH BUGS. 509 



men less abruptly dilated behind than in acutangula; the fourth con- 

 nexival obliquely subtruncate, its hind angle much less prominent. Hind 

 margin of last dorsal of male obviously but very broadly and shallowly 

 emarginate. Length, 6.5 — 7.5 mm. 



Hessville, Lake Co., Ind., June 30; Lahaway, N. J., Aug. 1 

 {Gerhard). Recorded heretofore only from Sanford, Fla., Mas- 

 sachusetts, Rhode Island and Connecticuut. 



II. Macrocephalus Swederus, 1787, 183. 

 Species of medium or small size having the head long, sub- 

 cylindrical, porrect ; antennae very short and stout, inserted on 

 the front of head between the lateral expansions of the cheeks ; 

 front lobe of pronotum much narrower and 

 on a lower plane than hind one, its front mar- 

 gin concave, disk granulate, hind lobe with 

 humeral angles obtuse, hind margin sinuate, 

 disk punctate ; scutellum elongate-oval, reach- 

 ing tip of abdomen, its apex rounded (fig. 

 125); connexivum almost wholly exposed; 

 front coxae very long, front femora greatly 

 enlarged, concave within and fitted with a 

 groove for the reception of the strongly 

 curved tibiae. Genital plate of male suborbicu- 

 ceph'aius n o ta t u s lar, convex, its hind margin depressed. About 



Westw., a Texas spe- . 



des; male, x 4. 30 species are known, mostly from tropical 



(After Champion). . . „ . . , . .. 



America, two of which occur in our territory. 



KEY TO EASTERN' SPECIES OF MACROCEPHALUS. 



a. Scutellum with a smooth yellowish calloused median carina or eleva- 

 tion, widest behind and reaching its middle or beyond; hind lobe of 

 pronotum bicarinate, its humeral angles notched ; larger, length 

 9 — 11 mm. 485. CIMICOIDES. 



aa. Scutellum with a narrow median carina which is yellowish and cal- 

 loused only at extreme base; hind lobe of pronotum with only 

 traces of carina?, its humeral angles obtuse, entire; smaller, not 

 over 5.5 mm. 486. prehensilis. 



485 (691). Macrocephalus cimicoides Swederus, 1787, 185. 



Elongate-oval, dilated behind. General color dull reddish-yellow, 

 the basal lobe of pronotum and scutellum purplish-brown, fading to 

 grayish-brown, the scutellar callosity yellow; antennae reddish-brown; 

 tibiae and tarsi greenish-yellow. Antenna? shorter than head, very stout, 

 basal joint subclavate, its apex hollowed out to receive the base of sec- 

 ond, the latter constricted to form a ball-like base; third joint slightly 

 longer than second, subclavate, fourth much stouter, fusiform or sub- 

 conical, slightly longer than 2 and 3 united. Front lobe of pronotum with 



