1918] Alydiucc of the United States 



Oi 



Tribe Micrelytrini Stal ClSliT). 



One northern, three subtropical and several tropical species 

 are united in this tribe. They resemble each other closely, are 

 more elongate and slender than an Alydus, and present a trim 

 appearance. In the first two genera the union of the juga above 

 and in front of the tylus gives .the head a very peculiar aspect. 



KEY TO GENERA OF MICRELYTRINI. 



a. Juga contiguous above apex of tylus; posterior angles of metapleura aeute, 

 more or less proikiccd; lat'^ral angles of pronotum and apex of scutellum 

 unarmed . 



b. Juga, as seen from the side, split at apex and much longer than 



tylus; antenna: with first two segments subequal Proteiior 



bb. Juga as seen from the side, entire at apex, not longer than tylus; 



antennas with second segment nearly twice as long as first. 



Dannistus 

 aa. Juga not contiguous at apex, never exceeding tylus. 



1). Pronotum with lateral angles each armed with spine; scutellum 

 with spine at apex; posterior angles of metapleura more or 



less acute Cvdamus 



bb. Pronotum with lateral angles unarmed; lateral and posterior 



margins of metapleura forming a right angle Esperanza 



Protenor Haglund. 

 Haplotyi)c liclfragei Haglund. 



Protenor Haglund (1868); Stal (18G7) 543, nom. nud., (1870) 217, (1873) 87- Distant 



(1881) 160. . / - 



Tetrarhinns Provancher (1872) 7.), (1885) 57. 



The produced juga, adjacent in front of the tylus and split 

 vertically and horizontally, and the elongated body, separate 

 this genus at a glance from all other Heteroptera. The following 

 species is the only member of the genus. 



1. Protenor belfragei Haglund. 



Protenor belfra'j,ei Haglund (1868)'; Stal (1870) 217-; Uhler (1872) 402^, (1876) 295^- 

 Van Duzee (1889)^ (1894)", (1905)', (1908)^ (1912)^; Osborn (1S92)'«, (1900)"' 

 Gdlette and Baker (1895)'-; Montgomerv (1902)'^; Bueno (1908b)iS(1910b)i5' 

 Smith (1910)1"; Parshley (1914)''; Barber (1914)'8. 



Tetrarhinns quebeceiisis Provancher (1872) 76'^ (1885) aT^^. 



Description. — Color flavescent, closely and regularly punctate 

 A\dth piceous dots above, more sparsely punctate with pale fuscous 

 or rufescent dots beneath; body, legs, and antennae elongate, slender. 



Head bearing a short mediodorsal groove between antenniferous 

 tubercles; juga contiguous above, surpassing tylus, and split at tip 

 vertically and horizontally so that head tenninates in four short 

 processes. Antenna; red, about as long as bod\'. 



Venter of abdomen pale, marked with a median black line continued 

 between hind coxk, and about a dozen black dots on each side. Hvpo- 

 pygium of male produced below into a caudomesal sharp spine directed 

 posteriorly. _ Sixth ventral segment of female slightly split at tip and 

 with _a medioventral tubercle near the posterior margin. 



Size 12-15 X 1.2-1.8 mm., males sHghtly smaller than females. 



